Web Enterprise Technologies Practice Test
Which of the following is the main purpose of client-side programming in web development?
A) To handle server-side logic and database management
B) To dynamically generate content in the browser
C) To manage user authentication
D) To store and retrieve data from the server
Which technology is primarily used for client-side scripting in dynamic websites?
A) PHP
B) JavaScript
C) SQL
D) Java
What is the role of a database in a dynamic website?
A) To store data that is retrieved and displayed to users
B) To compile code into executable files
C) To manage web server configuration
D) To handle user input and validation
Which of the following is an example of a relational database management system (RDBMS)?
A) MongoDB
B) MySQL
C) Redis
D) Cassandra
Which of the following client-side programming languages is used to manipulate HTML and CSS dynamically?
A) Ruby
B) JavaScript
C) PHP
D) C#
Which of the following HTML tags is used to create a form in a webpage?
A) <table>
B) <input>
C) <form>
D) <button>
What is the purpose of an AJAX request in a dynamic website?
A) To improve the visual appearance of the website
B) To handle server requests asynchronously without refreshing the page
C) To store data in the local database
D) To send emails to users
Which database query language is commonly used to interact with relational databases?
A) HTML
B) CSS
C) SQL
D) JavaScript
Which of the following is a common use case for using cookies in web development?
A) To store and retrieve user preferences
B) To store large amounts of data in the database
C) To compile JavaScript into machine code
D) To execute server-side queries
Which HTTP method is used to submit data from a form in HTML to a web server?
A) GET
B) POST
C) DELETE
D) PUT
Which of the following is NOT a key feature of a dynamic website?
A) User interaction through forms
B) Content that changes based on user actions
C) Static pages that never change
D) Real-time data fetching
Which of the following technologies is typically used for server-side scripting in a web application?
A) HTML
B) JavaScript
C) PHP
D) CSS
Which of the following is a key benefit of using an MVC architecture in web development?
A) It allows separation of concerns between data, business logic, and user interface
B) It helps in compiling JavaScript files faster
C) It manages cookies for each session
D) It stores images on the server
What is the role of an API in a dynamic web application?
A) To generate HTML content
B) To connect the front end and back end of the application
C) To execute database queries directly
D) To manage user authentication
Which of the following methods is commonly used for handling asynchronous requests in JavaScript?
A) Promise
B) SQL
C) Database triggers
D) GET requests
Which is the correct syntax for creating a table in SQL?
A) CREATE DATABASE table_name;
B) CREATE TABLE table_name (column1 datatype, column2 datatype);
C) CREATE FIELD table_name;
D) ADD TABLE table_name;
Which of the following is true about CSS?
A) It is used to structure the data in a web page
B) It is used to style the content of a web page
C) It is used for creating forms in HTML
D) It is used to interact with databases
Which of the following is a characteristic of responsive web design?
A) It uses CSS to adjust the layout based on screen size
B) It dynamically changes the data in the database
C) It uses SQL to connect to the server
D) It automatically sends emails to users
Which of the following is used to manage databases in PHP?
A) PDO (PHP Data Objects)
B) JavaScript
C) CSS
D) Node.js
Which of the following best describes the concept of “front-end” development?
A) Server-side programming for databases
B) Designing the user interface of a website
C) Writing SQL queries to fetch data
D) Managing website security
Which HTML element is used to link a web page to an external stylesheet?
A) <script>
B) <style>
C) <link>
D) <form>
Which SQL keyword is used to retrieve data from a database?
A) SELECT
B) UPDATE
C) INSERT
D) DELETE
Which of the following is a benefit of using JavaScript in web development?
A) It allows server-side scripting
B) It provides client-side interactivity
C) It stores data on the server
D) It compiles PHP code into executable format
Which technology allows a webpage to update its content dynamically without reloading the page?
A) AJAX
B) CSS
C) SQL
D) HTML
Which of the following is commonly used to manage state in a single-page application (SPA)?
A) Server-side programming
B) HTML forms
C) JavaScript frameworks like React or Angular
D) PHP scripts
Which of the following techniques is used to protect sensitive data on a website?
A) Client-side rendering
B) SSL/TLS encryption
C) SQL queries
D) AJAX requests
Which of the following is NOT a database management technique for ensuring data integrity?
A) Using primary keys
B) Using foreign keys
C) Writing data directly to a CSV file
D) Using transactions
Which of the following SQL commands is used to modify an existing record in a table?
A) INSERT
B) UPDATE
C) DELETE
D) SELECT
Which JavaScript feature allows for functions to be executed only once a response is received from the server?
A) Callbacks
B) Loops
C) Variables
D) Arrays
Which of the following web development frameworks is commonly used for building dynamic websites with server-side code?
A) Angular
B) Django
C) Bootstrap
D) React
Which of the following is NOT typically part of a RESTful API design?
A) Stateless communication
B) Use of HTTP methods like GET, POST, PUT, DELETE
C) Response format like JSON or XML
D) Persistent server-side sessions
Which of the following is a JavaScript framework commonly used for building dynamic user interfaces?
A) Express.js
B) Angular
C) Flask
D) SQLAlchemy
Which of the following is NOT a key benefit of using a Content Management System (CMS) for building dynamic websites?
A) Provides easy-to-use interface for non-developers
B) Automatically handles security vulnerabilities
C) Allows for easy updating and maintenance of content
D) Reduces the need for manual coding in web development
Which of the following tags is used to include an external JavaScript file in an HTML document?
A) <style>
B) <script>
C) <link>
D) <input>
Which of the following is a feature of a SQL JOIN operation?
A) It allows combining data from multiple tables into a single query result
B) It automatically deletes records from the database
C) It speeds up query execution without indexing
D) It validates user input from a form
Which of the following does a WebSocket protocol enable?
A) Real-time, bidirectional communication between a client and server
B) Storing data in the browser’s local storage
C) Running SQL queries on the client-side
D) Fetching static assets from the server
Which of the following is an advantage of using server-side validation in a dynamic website?
A) It increases the speed of user interactions
B) It ensures data is securely processed on the server
C) It allows for real-time data visualization
D) It provides immediate feedback to the user on the client-side
Which of the following is the primary use of JavaScript’s “localStorage”?
A) To store data that needs to be persisted between sessions on the client side
B) To store user preferences on the server
C) To create and display HTML elements dynamically
D) To execute SQL queries directly from the browser
Which SQL command is used to add new records to a database table?
A) INSERT
B) SELECT
C) UPDATE
D) DELETE
What is the purpose of a database index?
A) To speed up database queries by reducing search time
B) To prevent SQL injection attacks
C) To store backup copies of data
D) To organize the order of data on the server
What is the purpose of using “escape characters” in client-side programming?
A) To secure SQL queries from injection attacks
B) To include special characters in strings without breaking code
C) To format HTML elements dynamically
D) To create database tables
Which of the following is used to manage and execute JavaScript on the server-side?
A) Node.js
B) Angular
C) React
D) Bootstrap
Which of the following is an example of a NoSQL database?
A) PostgreSQL
B) MongoDB
C) MySQL
D) Oracle Database
What is the primary role of CSS in web development?
A) To create dynamic content
B) To retrieve data from the server
C) To format the layout and style of web pages
D) To manage the security of web applications
Which HTML5 feature allows web applications to store data locally in the browser for offline use?
A) Web Storage API
B) SQL database
C) Service Workers
D) Canvas API
Which of the following is true about a dynamic website compared to a static website?
A) It requires more server resources due to its interactivity and real-time data processing
B) It does not use databases for content management
C) It always loads the same content regardless of the user
D) It has limited functionality compared to static websites
Which of the following describes a “single-page application” (SPA)?
A) A website that consists of one static HTML file
B) A web app that dynamically loads content and interacts with the server without reloading the page
C) A website with only client-side scripting
D) A website that only shows a form and requires user login
Which of the following HTTP status codes indicates a successful request?
A) 404
B) 500
C) 200
D) 301
Which of the following best describes the “fetch” API in JavaScript?
A) It is used to fetch images from the server
B) It is used to send requests to a server and handle responses asynchronously
C) It is used to store data in the browser
D) It is used to validate form input
Which of the following is a key benefit of using version control in web development?
A) It automates the generation of HTML content
B) It tracks changes to code and enables collaboration among multiple developers
C) It secures SQL queries
D) It formats CSS code automatically
Which of the following best describes a “session” in web development?
A) A user interface element that is displayed in the browser
B) A method of storing data in the server for a user across multiple requests
C) A way to execute SQL queries asynchronously
D) A format used for API data exchange
Which of the following is the main function of the “PUT” HTTP method?
A) To create a new resource
B) To update an existing resource
C) To delete a resource
D) To fetch data from the server
Which of the following is a benefit of using a web framework like Django or Ruby on Rails?
A) It reduces the amount of boilerplate code and accelerates development
B) It allows you to write SQL queries directly in the HTML file
C) It ensures that web applications do not need any server-side processing
D) It completely eliminates the need for client-side programming
Which of the following is true about the “REST” architectural style for APIs?
A) It requires all data to be processed in real-time
B) It uses HTTP methods to manage resources
C) It supports only XML for data exchange
D) It mandates the use of a specific database engine
Which of the following is a key aspect of database normalization?
A) Combining multiple tables into a single table to simplify queries
B) Reducing redundancy and dependency by organizing data into multiple tables
C) Using SQL queries to execute client-side logic
D) Storing all data in text format to reduce complexity
What is the function of the “GET” HTTP method?
A) To send data to the server
B) To retrieve data from the server
C) To delete data on the server
D) To create new records in the server database
Which of the following is commonly used for managing sessions in web applications?
A) Cookies
B) SQL queries
C) CSS styles
D) LocalStorage
Which of the following best describes a content delivery network (CDN)?
A) A system for managing data privacy policies
B) A network of distributed servers that deliver content to users based on their geographic location
C) A method for validating user input
D) A database system used for relational data
Which of the following is used to prevent Cross-Site Scripting (XSS) attacks in dynamic web applications?
A) Validating and sanitizing user input
B) Using WebSockets for all communication
C) Storing passwords in plain text
D) Enabling client-side caching
Which JavaScript method is used to parse a JSON string into a JavaScript object?
A) JSON.stringify()
B) JSON.parse()
C) JSON.encode()
D) JSON.decode()
Which of the following is a benefit of using a Content Delivery Network (CDN) in web applications?
A) It ensures all data is stored in a single location
B) It improves website performance by distributing content across multiple servers
C) It makes server-side logic simpler
D) It encrypts database connections
Which SQL clause is used to filter records in a query result?
A) ORDER BY
B) WHERE
C) JOIN
D) GROUP BY
Which of the following is a feature of the HTML5 localStorage API?
A) It stores data permanently on the server
B) It is accessible from all browsers
C) It allows data to persist even after the browser is closed
D) It stores session data only for the current page
Which of the following JavaScript methods is used to add elements to the end of an array?
A) pop()
B) push()
C) shift()
D) unshift()
Which of the following best describes the purpose of a “primary key” in a relational database?
A) To link two different tables together
B) To uniquely identify each record in a table
C) To store a record temporarily
D) To sort records by a specific attribute
Which of the following is commonly used to implement the “Model” in an MVC architecture?
A) JavaScript
B) HTML
C) Database
D) CSS
What is the purpose of the GET HTTP method in web applications?
A) To submit data to be processed by the server
B) To retrieve data from the server
C) To delete data from the server
D) To modify data on the server
Which of the following is a characteristic of a NoSQL database?
A) It uses tables and relationships to organize data
B) It supports flexible schema designs for unstructured data
C) It is based on SQL queries
D) It uses foreign keys to manage relationships
Which of the following is an example of a relational database?
A) MongoDB
B) MySQL
C) Cassandra
D) Redis
Which method in JavaScript is used to make asynchronous HTTP requests?
A) open()
B) fetch()
C) send()
D) post()
Which of the following describes the function of the “PUT” HTTP method?
A) To retrieve data from a resource
B) To create a new resource
C) To update an existing resource
D) To delete a resource
Which of the following is true about the HTML <canvas> element?
A) It is used for creating interactive forms
B) It is used to draw graphics on the web page via JavaScript
C) It automatically handles user input
D) It stores media files locally
Which of the following SQL commands is used to modify the structure of an existing database table?
A) INSERT
B) SELECT
C) ALTER
D) DELETE
What is the purpose of the “Content-Type” header in HTTP requests?
A) To specify the format of the response data
B) To indicate the method of the request
C) To encrypt the transmitted data
D) To define the character encoding used in the request
Which of the following is a key benefit of using JavaScript frameworks like React or Angular?
A) They simplify server-side database management
B) They provide a structured approach to building dynamic, interactive user interfaces
C) They automatically generate SQL queries
D) They are used for formatting CSS styles
Which of the following is an example of an event that can be captured with JavaScript in the browser?
A) Server-side request
B) Database query
C) User clicking a button
D) API response
Which HTML element is used to define a hyperlink in a webpage?
A) <button>
B) <link>
C) <a>
D) <img>
Which of the following is NOT a common method of improving the security of a web application?
A) Using HTTPS to encrypt data transmission
B) Validating and sanitizing user input
C) Storing passwords in plain text in the database
D) Using access control mechanisms for sensitive data
What does the term “responsive web design” refer to?
A) A design that automatically adjusts to the type of content
B) A design that adapts the layout based on the user’s device screen size
C) A design focused on reducing server load
D) A design that uses JavaScript to change the page’s content dynamically
Which of the following SQL clauses is used to group rows that have the same values into summary rows?
A) ORDER BY
B) GROUP BY
C) WHERE
D) JOIN
Which of the following JavaScript features allows functions to be executed after a response is received from a server?
A) Callbacks
B) Loops
C) Functions
D) Variables
Which of the following describes the function of a “foreign key” in a relational database?
A) To uniquely identify a record in the database
B) To encrypt sensitive data
C) To create a relationship between two tables
D) To store backup copies of data
Which of the following is used to style HTML elements in a web page?
A) JavaScript
B) SQL
C) CSS
D) PHP
Which of the following is a JavaScript method for creating a new object?
A) newObject()
B) Object.create()
C) new Object()
D) Object.new()
Which of the following is a key advantage of using SQL queries over NoSQL for large-scale data storage?
A) SQL databases support unstructured data
B) SQL queries allow for complex joins and data relationships
C) SQL queries require no indexing
D) SQL databases are more flexible for handling diverse data types
Which of the following best describes a “stateless” web application?
A) A web application that retains session data across multiple requests
B) A web application where each request is independent of previous ones
C) A web application that stores persistent data on the client-side
D) A web application that uses only client-side scripting
Which of the following describes the use of “cookies” in web development?
A) To store large amounts of data on the server
B) To store small pieces of data on the client-side for session management or preferences
C) To handle asynchronous requests
D) To send data securely to the server
Which of the following is the most suitable method for securing passwords in a web application?
A) Storing passwords in plain text
B) Using a one-way hash function like bcrypt
C) Using weak encryption algorithms
D) Sending passwords via HTTP
Which of the following is a typical use of AJAX in dynamic web applications?
A) To refresh the entire webpage after submitting a form
B) To request and display data asynchronously without refreshing the page
C) To send an email notification after form submission
D) To validate input on the server
Which of the following best describes the use of “SQL injection” in web security?
A) A method for encrypting sensitive data
B) A type of attack where malicious SQL queries are inserted into the input fields of a website
C) A technique used for optimizing database queries
D) A mechanism for validating user input
Which of the following HTTP methods is idempotent, meaning it can be called multiple times without changing the result?
A) GET
B) POST
C) PUT
D) DELETE
Which of the following is the primary purpose of a RESTful API?
A) To fetch data using complex queries
B) To create a user interface
C) To provide a standardized way to access and manipulate resources over HTTP
D) To store data in a centralized database
Which of the following is a characteristic of a “stateless” web application?
A) The server remembers the user’s previous interactions
B) The server maintains a session for each user
C) Each request from a user is treated independently without storing session data
D) The server uses cookies to store user preferences
Which of the following database types is typically best suited for handling hierarchical or graph-based data?
A) Relational Database
B) NoSQL Database
C) Columnar Database
D) Graph Database
Which of the following JavaScript methods is used to remove the last element from an array?
A) pop()
B) shift()
C) unshift()
D) push()
Which of the following is used to modify an existing HTML element’s style using JavaScript?
A) getElementById()
B) querySelector()
C) style()
D) document.style()
Which of the following JavaScript objects is used to store data on the client-side in a structured way?
A) LocalStorage
B) XMLHttpRequest
C) SessionStorage
D) JSON
Which of the following is used to manage sessions in PHP web applications?
A) Cookies
B) Sessions
C) LocalStorage
D) JavaScript variables
Which of the following protocols is used to encrypt data transferred between a client and a server in a web application?
A) HTTP
B) HTTPS
C) FTP
D) SMTP
Which of the following describes the main purpose of a Content Management System (CMS)?
A) It automates the generation of SQL queries
B) It helps manage and organize the content of a website without requiring technical knowledge
C) It optimizes the performance of the server
D) It encrypts user passwords securely
Which of the following HTML elements is used to define an input field where the user can type in data?
A) <textarea>
B) <button>
C) <input>
D) <select>
Which of the following SQL commands is used to remove a record from a table?
A) INSERT
B) UPDATE
C) DELETE
D) SELECT
Which of the following HTTP status codes represents “Not Found”?
A) 400
B) 403
C) 404
D) 500
Which of the following is the main difference between SQL and NoSQL databases?
A) SQL is designed for unstructured data, while NoSQL is designed for structured data
B) SQL supports ACID transactions, while NoSQL supports BASE transactions
C) SQL uses document-based storage, while NoSQL uses relational tables
D) SQL is better for real-time applications, while NoSQL is not
Which of the following technologies is typically used to handle server-side logic in a web application?
A) JavaScript
B) HTML
C) Node.js
D) CSS
Which of the following is the primary purpose of using AJAX in a web application?
A) To store and retrieve data from the server synchronously
B) To allow asynchronous requests and update parts of the page without refreshing the entire page
C) To generate static HTML content dynamically
D) To handle user authentication
Which of the following JavaScript features allows functions to be executed once the DOM is fully loaded?
A) DOMContentLoaded event
B) window.onload
C) setInterval()
D) setTimeout()
Which of the following describes a “many-to-many” relationship in a relational database?
A) A record in one table is related to multiple records in another table, and vice versa
B) A record in one table can only be related to one record in another table
C) A record in one table can be related to multiple records in the same table
D) A record in one table can be related to no records in another table
Which of the following is a client-side JavaScript framework that is often used for building user interfaces?
A) Django
B) React
C) Laravel
D) Spring
Which of the following JavaScript methods is used to remove the first element from an array?
A) pop()
B) shift()
C) unshift()
D) push()
Which of the following describes the function of a “view” in the MVC (Model-View-Controller) architecture?
A) It handles user input and updates the database
B) It retrieves data from the model and displays it to the user
C) It stores the data for the application
D) It processes logic related to user actions
Which of the following is used to define a reusable style rule in CSS?
A) Selector
B) Property
C) Value
D) Attribute
Which of the following is an example of an asynchronous JavaScript operation?
A) alert()
B) setTimeout()
C) console.log()
D) return
Which of the following is the most appropriate method for handling errors in JavaScript?
A) try and catch
B) window.onerror
C) setTimeout()
D) console.log()
Which of the following CSS properties is used to control the background color of an element?
A) border
B) background-color
C) color
D) padding
Which of the following databases is best suited for storing unstructured data?
A) Relational databases
B) Columnar databases
C) Document-based NoSQL databases
D) In-memory databases
Which of the following is the primary purpose of using the LIMIT clause in a SQL query?
A) To sort the result set
B) To limit the number of records returned in the result set
C) To specify which columns to retrieve
D) To group records based on specific criteria
Which of the following describes the main purpose of the “DELETE” HTTP method?
A) To remove a resource from the server
B) To retrieve data from the server
C) To create a new resource
D) To update an existing resource
Which of the following is a key feature of the SQL INNER JOIN clause?
A) It combines rows from two tables where there is a match in both tables
B) It combines all rows from two tables regardless of a match
C) It only returns rows from one table
D) It is used to aggregate data from multiple columns
Which of the following is typically used to manage authentication in modern web applications?
A) SQL queries
B) OAuth
C) Cookies
D) Content Management Systems
Which of the following JavaScript methods is used to add an event listener to an element?
A) addEvent()
B) addListener()
C) attachEvent()
D) addEventListener()
Which of the following is a valid HTML5 semantic element?
A) <section>
B) <container>
C) <block>
D) <div2>
Which of the following is true about the difference between localStorage and sessionStorage in JavaScript?
A) localStorage stores data for the duration of the session, while sessionStorage stores data persistently
B) localStorage stores data persistently, while sessionStorage stores data for the duration of the session
C) Both localStorage and sessionStorage store data persistently
D) localStorage is only accessible in the same window, while sessionStorage is accessible in any window
Which of the following is an advantage of using a NoSQL database for web applications?
A) It offers complex SQL queries
B) It supports horizontal scalability and flexible schema
C) It has a predefined schema for storing data
D) It is always faster than SQL databases
Which of the following is a valid reason to use RESTful APIs in web applications?
A) To create a persistent connection with the server
B) To allow applications to communicate in a stateless, scalable way
C) To simplify database queries
D) To automatically generate user interfaces
Which of the following is a method for preventing SQL injection attacks in a web application?
A) Using regular expressions
B) Using parameterized queries or prepared statements
C) Encrypting all data
D) Storing data in encrypted files
Which of the following describes the function of the “HTML <form>” element?
A) It creates a table structure for the page content
B) It allows users to submit data to the server
C) It defines a block-level container for text
D) It creates a button to submit a page
Which of the following can be used to prevent the user from submitting an incomplete form in HTML?
A) form attribute
B) required attribute
C) readonly attribute
D) disabled attribute
Which of the following is the correct syntax for declaring a JavaScript variable?
A) var myVariable = 10;
B) let var myVariable = 10;
C) var = 10 myVariable;
D) 10 = var myVariable;
Which of the following HTTP status codes represents a successful request?
A) 200
B) 400
C) 403
D) 500
Which of the following attributes in an HTML <img> tag specifies the image’s alternative text?
A) src
B) alt
C) title
D) width
Which of the following is true about “AJAX” in web development?
A) AJAX is used to fetch data synchronously
B) AJAX allows for asynchronous requests without refreshing the entire page
C) AJAX is a type of server-side programming language
D) AJAX is only used for storing data in a database
Which of the following is an advantage of using a CDN (Content Delivery Network)?
A) It stores large files locally on the server
B) It reduces the load on the server by caching static content at various locations
C) It encrypts all user data automatically
D) It dynamically generates web pages on the fly
Which of the following is a correct way to write a comment in JavaScript?
A) // This is a comment
B) <!– This is a comment –>
C) /* This is a comment */
D) Both A and C are correct
Which of the following best describes a “foreign key” in relational database management systems?
A) A unique key that identifies a record within a table
B) A reference to a primary key in another table
C) A key used to encrypt sensitive data
D) A key that is only used for indexing purposes
Which of the following JavaScript methods can be used to fetch data from a server asynchronously?
A) open()
B) fetch()
C) send()
D) post()
Which of the following HTML tags is used to display an image on a webpage?
A) <figure>
B) <image>
C) <img>
D) <pic>
Which of the following is the purpose of the DOCTYPE declaration in HTML5?
A) It specifies the version of the HTML document
B) It links the page to external CSS files
C) It declares the character encoding for the page
D) It adds metadata about the document
Which of the following is a key benefit of using AJAX in web development?
A) It speeds up page load times by fetching data asynchronously
B) It encrypts all data before sending it to the server
C) It stores the data on the client-side
D) It requires no server-side logic
Which of the following is used to prevent unauthorized users from accessing certain web pages or resources?
A) Authentication
B) Session Management
C) Access Control
D) Query Optimization
Which of the following is used to provide structured data for search engines to index a webpage effectively?
A) Meta tags
B) Schema.org markup
C) Robots.txt
D) URL parameters
Which of the following is an example of a client-side web technology?
A) SQL
B) PHP
C) JavaScript
D) Python
Which of the following is used in web development to enhance the security of sensitive data in transit between client and server?
A) Using plain HTTP
B) Encrypting data with HTTPS
C) Storing data in plain text
D) Disabling cookies
Which of the following is a tool that can be used to manage version control for web development projects?
A) GIT
B) Nginx
C) Bootstrap
D) MySQL
Which of the following describes the function of an API (Application Programming Interface) in web development?
A) It serves as an interface for a user’s graphical environment
B) It allows different software systems to communicate with each other
C) It encrypts sensitive user data
D) It manages content delivery to websites
Which of the following is a characteristic of a “responsive web design”?
A) It adjusts its layout to the screen size of the user’s device
B) It requires static HTML content
C) It uses fixed dimensions for all elements
D) It only works on mobile devices
Which of the following CSS properties is used to control the spacing between the content and the border of an element?
A) margin
B) padding
C) border-spacing
D) height
Which of the following describes the purpose of a “session” in web applications?
A) It provides a permanent data storage location on the client-side
B) It stores data for the user across multiple pages during a visit to the site
C) It allows the server to manage its load during peak times
D) It allows the web server to execute multiple scripts simultaneously
Which of the following is a best practice for optimizing a web page’s performance?
A) Use large image files with minimal compression
B) Minimize the use of CSS and JavaScript
C) Reduce HTTP requests by combining files
D) Disable caching entirely
Which of the following is true about the <meta> tag in an HTML document?
A) It specifies the character encoding used by the document
B) It adds clickable links to external resources
C) It generates the content of the webpage
D) It provides styles for the page
Which of the following is a key feature of Progressive Web Apps (PWAs)?
A) They only work on desktop browsers
B) They provide offline capabilities and can be installed on mobile devices
C) They do not support push notifications
D) They require a server-side rendering engine
Which of the following technologies can be used to create a single-page web application (SPA)?
A) HTML5
B) React.js
C) MySQL
D) PHP
Which of the following JavaScript methods is used to create a new array from an existing array by transforming its elements?
A) concat()
B) map()
C) join()
D) reduce()
Which of the following is used to specify the layout of a webpage in a flexible manner using CSS?
A) position
B) float
C) flexbox
D) border
Which of the following is the most suitable database for handling highly structured data with complex relationships between tables?
A) NoSQL
B) Key-Value Store
C) Relational Database
D) In-memory Database
Which of the following is a benefit of using cloud-based web hosting for applications?
A) It provides automatic scaling based on demand
B) It requires manual server configuration
C) It stores data exclusively on a single server
D) It is more expensive compared to traditional hosting
Which of the following describes the purpose of the z-index property in CSS?
A) It controls the visibility of an element
B) It controls the stacking order of elements on the page
C) It controls the margin space around an element
D) It controls the font size of an element
Which of the following JavaScript methods is used to find the index of the first occurrence of an element in an array?
A) find()
B) indexOf()
C) includes()
D) slice()
Which of the following is the correct way to include an external JavaScript file in an HTML document?
A) <script href=”file.js”></script>
B) <script src=”file.js”></script>
C) <js file=”file.js”></js>
D) <include src=”file.js”></include>
Which of the following is an example of an HTTP request method that is used to update an existing resource on the server?
A) GET
B) POST
C) PUT
D) DELETE
Which of the following best describes a “relational database”?
A) A database that stores data in a tabular form with relationships between tables
B) A database that stores data as JSON documents
C) A database that only stores simple key-value pairs
D) A database that does not support joins
Which of the following HTML5 input types is used to allow the user to enter a date?
A) <input type=”date”>
B) <input type=”calendar”>
C) <input type=”datetime-local”>
D) <input type=”month”>
Which of the following JavaScript functions is used to convert an object into a JSON string?
A) JSON.parse()
B) JSON.stringify()
C) JSON.object()
D) JSON.convert()
Which of the following is the correct syntax for adding a comment in CSS?
A) <!– This is a comment –>
B) /* This is a comment */
C) // This is a comment
D) # This is a comment
Which of the following is used to control the size of the text inside an element in CSS?
A) font-family
B) font-size
C) text-align
D) line-height
Which of the following JavaScript methods is used to change the value of an existing element on the page?
A) setAttribute()
B) changeValue()
C) getElementById()
D) document.write()
Which of the following is a type of NoSQL database that stores data in a document format (typically JSON)?
A) Columnar Database
B) Graph Database
C) Document-based Database
D) Key-Value Store
Which of the following HTML tags is used to define a table row?
A) <table>
B) <tr>
C) <td>
D) <th>
Which of the following best describes a “view” in the MVC (Model-View-Controller) architecture?
A) The part of the application responsible for managing data
B) The part of the application responsible for handling user inputs
C) The part of the application responsible for displaying data to the user
D) The part of the application responsible for storing data
Which of the following is a key benefit of using version control in web development?
A) It allows for easy undoing of changes
B) It speeds up the development process by automatically generating code
C) It ensures that all code is deployed to the live server
D) It eliminates the need for testing
Which of the following is a web technology used to provide real-time, bidirectional communication between the client and server?
A) WebSockets
B) RESTful APIs
C) AJAX
D) SOAP
Which of the following CSS properties is used to make an element visible or hidden?
A) display
B) visibility
C) position
D) opacity
Which of the following JavaScript methods is used to sort the elements of an array?
A) sort()
B) order()
C) arrange()
D) shuffle()
Which of the following describes the concept of “client-side scripting”?
A) Code that runs on the server to generate dynamic content
B) Code that runs in the browser to create interactive webpages
C) Code that stores data on the server
D) Code that manages databases on the server
Which of the following HTML elements is used to define an ordered list?
A) <ul>
B) <ol>
C) <li>
D) <dl>
Which of the following best describes the purpose of a “header” in an HTML document?
A) It defines the main content of the webpage
B) It provides metadata and links to resources such as stylesheets and scripts
C) It defines the footer section of the webpage
D) It contains the navigation menu for the webpage
Which of the following JavaScript methods is used to add a new element to the end of an array?
A) push()
B) unshift()
C) pop()
D) shift()
Which of the following is the correct syntax to add a new row to a table in HTML?
A) <row><td>Data</td></row>
B) <tr><td>Data</td></tr>
C) <table><row><td>Data</td></row></table>
D) <table><tr><td>Data</td></tr></table>
Which of the following is true about the fetch() method in JavaScript?
A) It is used to retrieve data from a server asynchronously
B) It blocks the execution of other JavaScript code until a response is received
C) It can only be used to send data to the server
D) It returns a promise that is resolved with the response object
Which of the following is an example of a key-value store NoSQL database?
A) MongoDB
B) Redis
C) Neo4j
D) MySQL
Which of the following describes a “cloud-native” application?
A) An application designed to run in a traditional data center
B) An application optimized to run on cloud infrastructure and take advantage of cloud features
C) An application that can only be deployed on physical servers
D) An application that does not require internet access to function
Which of the following is used to define a hyperlink in HTML?
A) <link>
B) <a>
C) <href>
D) <url>
Which of the following JavaScript methods is used to remove the last element from an array?
A) shift()
B) pop()
C) unshift()
D) push()
Which of the following best describes a “content management system (CMS)”?
A) A tool for managing the network infrastructure of a website
B) A system for managing content creation and editing on a website without requiring technical knowledge
C) A system for managing server configurations
D) A system for storing encrypted user data
Which of the following is true about “cross-origin resource sharing (CORS)”?
A) It allows web browsers to make requests to different domains safely
B) It is only used for server-side communication
C) It restricts all client-side requests to the same origin
D) It is only applicable to RESTful APIs
Which of the following best describes the “shadow DOM” in web development?
A) A JavaScript object that represents a DOM element in memory
B) A DOM tree that is isolated from the main DOM to allow for encapsulated styling and behavior
C) A CSS technique for hiding certain parts of the webpage
D) A method for debugging DOM elements in a browser
Which of the following is used to store large amounts of structured data in a non-relational database?
A) Tables
B) Documents
C) Rows
D) Keys
Which of the following is an example of a relational database?
A) MongoDB
B) Cassandra
C) MySQL
D) Firebase
Which of the following is a feature of HTML5 that improves the interaction between a webpage and its users?
A) Video and audio embedding without third-party plugins
B) Database support using tables
C) Deprecation of JavaScript
D) Support for HTTP 2.0
Which of the following JavaScript methods is used to call a function at a specified interval of time?
A) setInterval()
B) setTimeout()
C) callInterval()
D) loopFunction()
Which of the following is the primary purpose of using responsive web design techniques?
A) To make the website compatible with all web browsers
B) To ensure the website layout adapts to different screen sizes and devices
C) To improve the website’s search engine ranking
D) To enhance the website’s server-side processing speed
Which of the following is used in CSS to apply a background image to an element?
A) background-url
B) background-image
C) background
D) image-background
Which of the following is an example of an API that allows for interaction with the browser’s local storage?
A) IndexedDB API
B) Geolocation API
C) WebSocket API
D) Canvas API
Which of the following best describes “serverless architecture”?
A) A method of programming that does not require server-side logic
B) A cloud computing execution model where developers focus on writing code without managing servers
C) A development method that entirely omits web servers
D) A technique used for hosting server-side components on dedicated hardware
Which of the following is the best approach for preventing unauthorized access to sensitive resources in web applications?
A) Storing passwords in plain text
B) Using strong authentication mechanisms like OAuth or JWT
C) Relying solely on HTTP for secure communication
D) Disabling cookies and sessions
Which of the following is a purpose of using a “content delivery network (CDN)”?
A) To reduce the overall file size of a website
B) To increase the availability and speed of content delivery by caching static content closer to the user
C) To dynamically generate content based on user input
D) To encrypt content for secure delivery
Which of the following CSS properties is used to control the alignment of text inside an element?
A) align
B) text-align
C) justify-content
D) align-items
Which of the following JavaScript methods is used to remove an element from the DOM?
A) deleteElement()
B) removeChild()
C) removeElement()
D) destroyElement()
Which of the following JavaScript operators is used to check for equality while also checking for the same type?
A) ==
B) !=
C) ===
D) !==
Which of the following is a key advantage of using cloud-based databases in web applications?
A) They require no internet connection
B) They offer high availability, scalability, and automatic backups
C) They store data in fixed, predefined schemas
D) They are only accessible from a single device
Which of the following is the correct way to style an HTML element using CSS?
A) <style=”color: red;”>p</style>
B) style=”color: red;”
C) <style>p { color: red; }</style>
D) <p color=”red”>
Which of the following is the purpose of the “viewport” meta tag in HTML5?
A) To specify the background image of the page
B) To define the character encoding used by the page
C) To control the page’s zoom and scaling behavior on mobile devices
D) To specify the title of the webpage
Which of the following is used to add interactive behavior to a webpage?
A) CSS
B) HTML
C) JavaScript
D) PHP
Which of the following defines the structure of data for web applications in a format that can be easily exchanged between server and client?
A) XML
B) CSV
C) JSON
D) SQL
Which of the following is true about the JavaScript localStorage object?
A) Data stored in localStorage is persistent across sessions but only available for the duration of a page load
B) Data stored in localStorage is persistent across sessions and remains even after the browser is closed
C) Data in localStorage is cleared after 24 hours
D) localStorage is used for server-side storage only
Which of the following is an example of a JavaScript promise status?
A) done
B) resolved
C) success
D) executed
Which of the following is used to represent an image in vector form, suitable for responsive web design?
A) JPEG
B) PNG
C) SVG
D) GIF
Which of the following best describes the concept of “latency” in web performance?
A) The time it takes for a request to travel to the server and back to the client
B) The time it takes for the browser to render the content of a page
C) The speed at which a website loads its resources
D) The time it takes for the database to retrieve data
Which of the following JavaScript methods is used to execute a function once after a delay?
A) setTimeout()
B) setInterval()
C) delayFunction()
D) executeAfter()
Which of the following is used in web development to display information in real-time without refreshing the page?
A) AJAX
B) Static Content
C) Server-side Rendering
D) jQuery
Which of the following is an example of a client-side scripting language used for creating dynamic websites?
A) Java
B) Python
C) JavaScript
D) Ruby
Which of the following protocols is commonly used for secure communication over a network?
A) HTTP
B) FTP
C) HTTPS
D) IMAP
Which of the following HTML elements is used to define the navigation links on a webpage?
A) <nav>
B) <header>
C) <footer>
D) <section>
Which of the following best describes “responsive web design”?
A) Designing websites to work well on desktop devices only
B) Designing websites to be compatible with modern web browsers
C) Designing websites to adjust and adapt to various screen sizes and devices
D) Designing websites that use minimal CSS and JavaScript
Which of the following is the purpose of the “action” attribute in a <form> element in HTML?
A) It specifies how the form data will be styled
B) It specifies the method of sending form data to the server
C) It specifies the URL to which the form data is sent
D) It specifies whether the form should be submitted asynchronously
Which of the following is true about the async attribute in JavaScript?
A) It ensures the script is executed after the HTML content is fully loaded
B) It loads the script asynchronously, allowing the page to continue loading while the script is being fetched
C) It causes the script to be executed synchronously, blocking other tasks
D) It is used to ensure that a script is executed before any other content on the page
Which of the following is an example of a NoSQL database?
A) MongoDB
B) MySQL
C) Oracle
D) PostgreSQL
Which of the following is used to specify the order in which flex items are displayed in a flex container in CSS?
A) order
B) align-items
C) justify-content
D) flex-grow
Which of the following is the main advantage of using a RESTful API over a SOAP-based API?
A) RESTful APIs require less bandwidth and are simpler to use
B) SOAP APIs provide better security features than RESTful APIs
C) RESTful APIs are not supported by modern web browsers
D) SOAP APIs are easier to implement than RESTful APIs
Which of the following CSS properties is used to control the space between words in a text block?
A) letter-spacing
B) word-spacing
C) line-height
D) text-indent
Which of the following is a characteristic of a single-page application (SPA)?
A) The page reloads with each user interaction
B) It loads a new page for every user action
C) It dynamically updates the content without reloading the entire page
D) It does not require JavaScript
Which of the following is the purpose of the localStorage object in JavaScript?
A) To store data on the client’s device that persists across sessions
B) To send data from the client to the server
C) To store data only temporarily for the current session
D) To encrypt data on the client-side
Which of the following is true about the input[type=”file”] element in HTML?
A) It allows users to select multiple files for upload without any restrictions
B) It enables users to select only one file for upload at a time
C) It is used for submitting forms with images only
D) It does not allow users to select files from their device
Which of the following CSS properties is used to control the visibility of an element without removing it from the document flow?
A) display
B) visibility
C) opacity
D) position
Which of the following methods in JavaScript is used to remove an element from the beginning of an array?
A) shift()
B) pop()
C) unshift()
D) slice()
Which of the following is the correct order of HTML elements when defining the structure of a webpage?
A) <html>, <head>, <body>, <title>
B) <html>, <body>, <head>, <title>
C) <head>, <body>, <html>, <title>
D) <html>, <title>, <head>, <body>
Which of the following JavaScript functions is used to execute code after a certain delay?
A) setInterval()
B) setTimeout()
C) delay()
D) loop()
Which of the following JavaScript functions is used to retrieve an element from the DOM by its ID?
A) getElementById()
B) querySelector()
C) getElementByTagName()
D) querySelectorAll()
Which of the following is used to optimize the performance of large-scale web applications by caching the response?
A) LocalStorage
B) Web Workers
C) Service Workers
D) IndexedDB
Which of the following is true about the width property in CSS?
A) It sets the width of the element’s content area, excluding padding and borders
B) It sets the width of the element, including padding and borders
C) It only sets the width of the padding area of an element
D) It sets the width of the entire page
Which of the following best describes the purpose of a RESTful API?
A) To create interactive web applications
B) To enable communication between the server and the client over HTTP
C) To send data from the client to the server using WebSockets
D) To interact with the database directly
Which of the following is true about the display property in CSS?
A) It controls the visibility of an element on the page
B) It determines how an element is rendered in the layout
C) It is used to align text within an element
D) It defines the font style for text inside an element
Which of the following describes the @media rule in CSS?
A) It defines the transition effects for a webpage
B) It allows CSS rules to be applied based on the screen size and other media queries
C) It defines the font size for a webpage
D) It specifies which images to use on mobile devices
Which of the following is a feature of the canvas element in HTML5?
A) It allows for rendering 2D shapes and images using JavaScript
B) It is used to embed videos within a webpage
C) It is used for creating forms in HTML
D) It displays static content on the webpage
Which of the following JavaScript objects is used to handle dates and times?
A) Date
B) Time
C) Timestamp
D) Moment
Which of the following is a method for structuring data in a NoSQL database?
A) Tables
B) Collections
C) Rows
D) Schemas
Which of the following is the purpose of using a web server?
A) To store data for a website
B) To serve static files and process requests from web clients
C) To generate HTML pages
D) To render the website’s graphical content
Which of the following is used to apply styles to specific parts of a webpage, such as headers or paragraphs, in CSS?
A) Classes
B) Selectors
C) Tags
D) Elements
Which of the following HTML elements is used to group inline elements within a webpage?
A) <div>
B) <span>
C) <p>
D) <section>
Which of the following describes the concept of “web scraping”?
A) Collecting data from online forms
B) Extracting data from websites using automated scripts
C) Indexing websites for search engines
D) Creating and deploying websites on the internet
Which of the following best describes the role of a web server in a website’s architecture?
A) To generate and serve HTML content
B) To handle database queries and transactions
C) To store user data in local storage
D) To manage client-side interactions with the webpage
Which of the following is a major benefit of using a Content Management System (CMS)?
A) It allows users to update and manage website content without requiring programming knowledge
B) It eliminates the need for web hosting
C) It restricts user access to website content
D) It automatically converts images to the web’s preferred formats
Which of the following CSS properties is used to define the space between the content of an element and its border?
A) padding
B) margin
C) border-width
D) text-align
Which of the following describes a “stateless” HTTP request?
A) The server maintains information about the client between requests
B) The client maintains session information
C) The server does not retain any session information between requests
D) The server sends cookies to store session data
Which of the following is a common way to prevent Cross-Site Scripting (XSS) attacks in web applications?
A) Allowing only GET requests
B) Using content security policies and sanitizing user inputs
C) Enabling browser caching
D) Disabling cookies
Which of the following is an example of an API that facilitates real-time communication between a client and a server?
A) REST API
B) WebSocket API
C) JSON API
D) GraphQL API
Which of the following is true about Single Page Applications (SPA)?
A) SPAs require the page to reload for each user interaction
B) SPAs do not use JavaScript for dynamic content loading
C) SPAs update content dynamically within a single page, improving user experience
D) SPAs rely on server-side rendering exclusively
Which of the following describes the role of a Content Delivery Network (CDN)?
A) It stores all the dynamic content of a website
B) It caches static resources and delivers them from locations closer to the user
C) It provides security encryption for all website transactions
D) It monitors the website traffic for optimization
Which of the following describes the use of the onclick attribute in JavaScript?
A) It allows the user to submit a form when a button is clicked
B) It defines the style of a button when clicked
C) It specifies a JavaScript function to run when an element is clicked
D) It defines the layout of a webpage when clicked
Which of the following JavaScript methods is used to convert a string into a number?
A) parseInt()
B) toString()
C) isNaN()
D) stringify()
Which of the following is the correct HTML5 element to embed video content in a webpage?
A) <video>
B) <audio>
C) <embed>
D) <media>
Which of the following is used to define the style of an element in an external stylesheet?
A) class
B) id
C) element selector
D) attribute selector
Which of the following best describes the use of localStorage in web development?
A) It allows for storing data on the client side with no expiration date
B) It allows for storing data on the server side for dynamic content
C) It stores data in a database
D) It stores encrypted data for security purposes
Which of the following is a key feature of the flexbox layout model in CSS?
A) It is used to align text within a container
B) It allows for efficient two-dimensional layout of items, both vertically and horizontally
C) It positions elements absolutely relative to the page
D) It creates a grid layout with fixed rows and columns
Which of the following CSS properties is used to set the visibility of an element without affecting the document flow?
A) opacity
B) visibility
C) display
D) z-index
Which of the following is true about AJAX (Asynchronous JavaScript and XML)?
A) AJAX requires full page reload to update the content
B) AJAX enables asynchronous communication with the server, allowing dynamic content updates without reloading the page
C) AJAX can only be used with XML data
D) AJAX is only supported by legacy web browsers
Which of the following is a common use case for WebSockets?
A) Streaming video content
B) Real-time chat applications and live notifications
C) Storing static content in the browser
D) Sending large data packets over HTTP
Which of the following JavaScript functions is used to check if a variable is an integer?
A) parseInt()
B) isInteger()
C) Number.isInteger()
D) Math.isInteger()
Which of the following HTML elements is used to define a list of items?
A) <ul>
B) <li>
C) <ol>
D) <dl>
Which of the following is true about the position: fixed CSS property?
A) The element is positioned relative to its closest positioned ancestor
B) The element is positioned relative to the viewport, staying in place when the page is scrolled
C) The element is positioned relative to the document flow
D) The element is removed from the document flow entirely
Which of the following is true about the use of CORS (Cross-Origin Resource Sharing)?
A) It is used to block all requests from other domains
B) It allows servers to specify which external domains can access their resources
C) It is a security mechanism that encrypts user credentials
D) It only applies to requests made from the server-side
Which of the following JavaScript methods is used to execute a function after a certain delay?
A) setInterval()
B) setTimeout()
C) delay()
D) defer()
Which of the following is used to add a style to a specific HTML element in JavaScript?
A) setStyle()
B) style.set()
C) element.style.property
D) addStyle()
Which of the following describes a “microservice” architecture?
A) An architecture where all components are tightly coupled and share a single database
B) An architecture that breaks down an application into smaller, independent services that communicate via APIs
C) An architecture that uses a monolithic approach for all backend services
D) An architecture that limits server-side computation by using only client-side technologies
Which of the following CSS properties is used to define the font style of a webpage?
A) font-family
B) font-size
C) font-weight
D) font-style
Which of the following describes the purpose of a querySelector() in JavaScript?
A) It selects all elements with a specific class name
B) It selects all elements with a specific tag name
C) It selects the first element that matches a CSS selector
D) It selects an element by its index in the DOM tree
Which of the following is the best way to store sensitive user data in a web application?
A) In plain text in localStorage
B) Encrypted in a secure server-side database
C) In cookies without any encryption
D) In a URL parameter
Which of the following describes “server-side rendering” (SSR) in web development?
A) Rendering content directly in the browser using JavaScript
B) Rendering content on the server before sending it to the client
C) Rendering content asynchronously while the page loads
D) Rendering content only after user interaction
Which of the following is used to control how items are ordered in a CSS grid layout?
A) grid-template
B) grid-order
C) grid-row
D) order
Which of the following is true about “responsive design” in the context of mobile-first web development?
A) Mobile-first design starts with designing for desktop and adapts for smaller screens
B) It focuses on developing separate versions of the website for mobile and desktop
C) It focuses on designing for smaller screens first, and scales up to larger screens
D) It only applies to mobile applications
Which of the following describes the use of min-width and max-width in CSS?
A) They are used to set the minimum and maximum height of an element
B) They are used to limit the width of an element within a specified range
C) They define the minimum and maximum text size for an element
D) They control the positioning of an element on the page
Which of the following HTML elements is used to create a hyperlink?
A) <a>
B) <button>
C) <form>
D) <link>
Which of the following JavaScript methods is used to convert a JSON string into a JavaScript object?
A) JSON.parse()
B) JSON.stringify()
C) JSON.convert()
D) JSON.parseObject()
Which of the following defines an object in JavaScript?
A) {key: value, key: value}
B) key = value;
C) var key = value;
D) key => value;
Which of the following is used to modify the structure of a webpage dynamically using JavaScript?
A) Document Object Model (DOM)
B) Cascading Style Sheets (CSS)
C) Hypertext Preprocessor (PHP)
D) Hypertext Markup Language (HTML)
Which of the following is true about the use of sessionStorage in JavaScript?
A) Data stored in sessionStorage persists across browser tabs and windows
B) Data stored in sessionStorage persists only for the duration of the page session
C) Data in sessionStorage is automatically deleted after 24 hours
D) sessionStorage can store encrypted data only
Which of the following describes the purpose of the meta tag in HTML?
A) It is used to define the visual style of an element
B) It provides metadata such as the character set, author, or viewport settings
C) It is used to add hyperlinks to other websites
D) It defines a JavaScript function for form validation
Which of the following is used to create an unordered list in HTML?
A) <ul>
B) <ol>
C) <dl>
D) <list>
Which of the following is true about the getElementById() method in JavaScript?
A) It selects the first element with the specified class name
B) It selects the first element with the specified tag name
C) It selects the element with the specified ID attribute
D) It selects the last element with the specified class name
Which of the following is the primary purpose of a cookie in web development?
A) To store encrypted user credentials for security
B) To store user-specific data for a session, such as preferences or login status
C) To load images asynchronously on a webpage
D) To control the visibility of HTML elements
Which of the following is the correct CSS property used to set the background color of an element?
A) background-color
B) color-background
C) bgcolor
D) background-style
Which of the following best describes the fetch API in JavaScript?
A) It retrieves data from the server synchronously
B) It is used to create new data on the server
C) It is used to make asynchronous requests to the server and handle the response
D) It fetches files from the local file system
Which of the following is the purpose of the flex property in CSS?
A) It allows items within a flex container to grow and shrink based on available space
B) It sets the width of items in a flex container
C) It defines the layout for the flex container
D) It defines the direction of a flex container
Which of the following is a valid HTML5 input type used for selecting a date?
A) <input type=”date”>
B) <input type=”calendar”>
C) <input type=”datetime”>
D) <input type=”text” type=”date”>
Which of the following is an example of a server-side programming language?
A) JavaScript
B) HTML
C) PHP
D) CSS
Which of the following is a feature of the grid layout in CSS?
A) It allows for two-dimensional layout of elements in both rows and columns
B) It is used to position items in a single row only
C) It is used to control text alignment within elements
D) It is used to arrange elements in a circular pattern
Which of the following HTML elements is used to define a form in a webpage?
A) <form>
B) <input>
C) <button>
D) <fieldset>
Which of the following methods is used to parse a JSON string in JavaScript?
A) JSON.parse()
B) JSON.stringify()
C) JSON.decode()
D) JSON.parseString()
Which of the following is used to display a message in the browser’s console for debugging purposes in JavaScript?
A) console.log()
B) alert()
C) document.write()
D) log.message()
Which of the following describes a “progressive web app” (PWA)?
A) A mobile application that uses a native framework for development
B) A website that can function offline and be installed on a user’s device
C) A website with fixed content that doesn’t change
D) A mobile app that works only on iOS devices
Which of the following is a feature of CSS transitions?
A) They allow elements to move from one state to another with an animation
B) They allow elements to appear and disappear instantaneously
C) They are used to create loops of animations
D) They are only supported by certain browsers
Which of the following is used to store large amounts of data in a key-value format in a web browser?
A) LocalStorage
B) Cookies
C) IndexedDB
D) SessionStorage
Which of the following CSS properties is used to center an element horizontally within its parent container?
A) margin: 0 auto;
B) text-align: center;
C) display: flex; justify-content: center;
D) position: absolute; left: 50%;
Which of the following describes the DOM (Document Object Model) in web development?
A) It is used to define the layout and style of a webpage
B) It is a programming interface for HTML and XML documents, representing the page as a tree structure
C) It is a method of handling the server-client interaction
D) It is used to retrieve JSON data from an API
Which of the following is a method of preventing SQL injection attacks in web development?
A) Use inline SQL queries in JavaScript
B) Always use prepared statements with bound parameters
C) Use eval() to execute user input
D) Disable all user input fields
Which of the following JavaScript methods is used to return the first element that matches a given CSS selector?
A) querySelector()
B) getElementById()
C) getElementsByClassName()
D) querySelectorAll()
Which of the following describes the z-index property in CSS?
A) It determines the vertical alignment of elements
B) It controls the stacking order of elements on the z-axis (overlapping elements)
C) It controls the transparency of elements
D) It defines the maximum width of an element
Which of the following is a best practice for optimizing the performance of a website?
A) Using large images without compression
B) Minimizing the use of JavaScript
C) Compressing images and minifying CSS and JavaScript files
D) Avoiding the use of a CDN
Which of the following JavaScript functions is used to extract a section of an array?
A) slice()
B) splice()
C) split()
D) filter()
Which of the following is a method of authenticating users in a web application?
A) Using cookies to store passwords
B) Using OAuth or JWT (JSON Web Tokens) for token-based authentication
C) Storing user credentials in plain text
D) Storing session data in localStorage