JNCIA-DevOps (JN0-224) Certification Test Questions and Answers
Are you ready to validate your Juniper DevOps skills and confidently pass the JNCIA-DevOps (JN0-224) exam? This expertly designed JN0-224 2025 Practice Exam is your ultimate preparation resource, crafted to help aspiring network and automation professionals master the full range of Junos DevOps concepts, tools, and practices.
This practice test simulates the real exam experience with 300+ high-quality, exam-relevant multiple-choice questions, each with detailed explanations. Whether you’re a network engineer, automation specialist, or DevOps practitioner, this resource will sharpen your understanding and prepare you to succeed on exam day.
✅ Exam Overview
The JNCIA-DevOps (JN0-224) certification exam tests your knowledge of Juniper Networks automation frameworks, Junos operational modes, configuration management, APIs (NETCONF/RESTCONF), scripting, CI/CD tools, and infrastructure as code principles. This practice exam covers all key areas aligned with the official Juniper exam blueprint, including:
Junos automation architecture and tools
NETCONF, REST API, and RESTCONF protocols
Junos scripting (SLAX, Python, op/commit scripts)
PyEZ and Ansible for configuration management
CI/CD workflows using Jenkins, Git, and pipelines
YANG data models and device programmability
Junos operational mode and rollback functionality
Configuration syntax, commit options, and rescue configurations
Integration of Junos with DevOps toolchains
🎯 Why Choose This JNCIA-DevOps Practice Exam?
300 Updated Practice Questions: Includes real-world scenarios and command-line-based questions reflecting the latest JN0-224 2025 exam format.
In-Depth Explanations: Each question is backed with a clear, explanation, reinforcing core concepts and helping you learn from your mistakes.
Exam-Aligned Content: Every question is mapped to Juniper’s DevOps exam objectives, ensuring full coverage of the testable domains.
Ideal for DevOps and Network Engineers: Perfect for professionals transitioning from traditional networking to DevOps roles or preparing for Juniper certification.
🧠 What You’ll Learn
This practice exam ensures you can:
Automate configuration tasks on Junos devices using Ansible and PyEZ
Work with YANG models to define device configuration and operational state
Implement and troubleshoot NETCONF and RESTCONF APIs
Create and manage Junos commit scripts and op scripts
Integrate Junos automation into CI/CD pipelines using tools like Jenkins
Leverage Jinja2 templates, Ansible roles, and dynamic inventories for automation
Safely manage device state using rollback, rescue, and commit confirmed
Retrieve operational data using REST APIs and perform automation testing
Manage system logs, chassis alarms, and validate changes before deploying to production
Practice idempotent infrastructure changes using best DevOps practices
📈 Who Should Use This Exam?
Network Engineers preparing to earn the Juniper Certified Associate – DevOps (JN0-224) credential
Automation Professionals working with Junos OS in cloud or hybrid environments
DevOps Engineers expanding into network automation using Python, Ansible, or REST APIs
IT Teams and Students seeking hands-on, real-world questions for revision and skills-building
🛠️ Topics Covered Include:
Junos automation architecture
Device onboarding and configuration automation
Python scripting with Junos PyEZ
Ansible modules for Junos (
junos_config,junos_command)NETCONF over SSH and RESTCONF over HTTPS
Configuration rollback, rescue, commit check, and commit confirmed
Jenkinsfile, Git workflows, and pipeline stages
REST API status codes and response formats (JSON/XML)
YANG-driven automation and data validation
Ansible best practices (roles, handlers, loops, variables)
Master Juniper DevOps with Confidence
The future of networking is programmable, agile, and automated. By preparing with this JN0-224 2025 practice exam, you’ll not only be ready to pass your certification—you’ll also be building foundational skills that will advance your career in network automation and DevOps.
Start preparing today and become a certified JNCIA-DevOps professional. Make your exam success inevitable.
Sample Questions and Answers
What is the primary purpose of the Junos automation framework?
A. To improve device security
B. To simplify manual CLI configuration
C. To enable automated configuration, management, and operational tasks
D. To encrypt traffic across Juniper devices
Answer: C
Explanation:
The Junos automation framework is designed to simplify and automate configuration, monitoring, and management tasks using tools like SLAX, Python, and event scripts.
Which Junos feature enables event-driven automation using SLAX or Python?
A. JET
B. PyEZ
C. Event Policy Manager
D. Event Scripts
Answer: D
Explanation:
Event scripts respond to system-generated events using SLAX or Python, enabling dynamic, automatic responses to network changes.
In a REST API context, what does the HTTP status code 201 indicate?
A.Request accepted but not yet processed
B. Resource successfully created
C. Unauthorized request
D. Bad request
Answer: B
Explanation:
HTTP 201 means the server has successfully fulfilled the request and created a new resource, commonly used in POST operations.
What is the function of the Junos JET API?
A. Provides SNMP-based automation
B. Allows programmatic access to Junos OS using high-speed APIs
C. Enables GUI-based configuration only
D. Blocks external automation tools from accessing Junos devices
Answer: B
Explanation:
The Junos Extension Toolkit (JET) enables developers to use modern programming methods to interact with Junos using APIs for operational and configuration tasks.
What is the primary benefit of infrastructure as code (IaC) in DevOps?
A. It allows direct CLI management
B. Reduces the need for configuration backups
C. Enables consistent, repeatable infrastructure deployment using code
D. Improves hardware replacement cycles
Answer: C
Explanation:
IaC allows infrastructure to be managed using code, enabling version control, automation, and repeatability across environments.
What file format is used for Ansible playbooks?
A. XML
B. YAML
C. JSON
D. CSV
Answer: B
Explanation:
Ansible playbooks are written in YAML due to its readability and simplicity for defining automation tasks.
Which tool allows you to manage and automate Junos devices using a Python library?
A. Ansible
B. Chef
C. PyEZ
D. JET CLI
Answer: C
Explanation:
Juniper PyEZ is a Python library that provides automation and scripting capabilities for Junos devices.
What is the default port used for RESTful API access on Junos?
A. 8080
B. 3000
C. 443
D. 5000
Answer: C
Explanation:
HTTPS (port 443) is commonly used for secure REST API communication with Junos devices.
Which Python module allows you to connect to a Junos device using NETCONF?
A. junos-ez
B. ncclient
C. pyconf
D. junipercli
Answer: B
Explanation:
The ncclient Python library enables NETCONF sessions to Junos devices for configuration and operational tasks.
What is the primary advantage of using commit scripts in Junos OS?
A. To encrypt configuration files
B. To run custom tasks after committing
C. To validate and enforce configuration policies before committing
D. To update the Junos OS image
Answer: C
Explanation:
Commit scripts are used to validate configurations against business or operational rules before they are committed to the device.
Which tool is commonly used to orchestrate multi-device configurations in Junos environments?
A. GitHub
B. Jenkins
C. Ansible
D. Grafana
Answer: C
Explanation:
Ansible is widely used to automate multi-device configurations using playbooks and SSH access.
What is the correct HTTP method for retrieving resource information using REST?
A. PUT
B. POST
C. GET
D. DELETE
Answer: C
Explanation:
GET requests are used to retrieve data from REST APIs without modifying any resources.
What is the role of a ‘play’ in an Ansible playbook?
A. To define a single device task
B. To specify actions taken by a host
C. To execute CLI commands
D. To backup configurations
Answer: B
Explanation:
A play maps a group of hosts to tasks that should be run, defining what each host will do in the automation workflow.
In Jenkins, what is a “pipeline”?
A. A monitoring tool
B. A version control system
C. A sequence of automated stages/tasks
D. A network configuration file
Answer: C
Explanation:
A Jenkins pipeline is a defined process that automates stages such as build, test, and deploy within a DevOps workflow.
What does the “idempotent” property of Ansible tasks mean?
A. Tasks can execute multiple times with different outcomes
B. Each task is only allowed to run once
C. Repeated execution yields the same result
D. Task execution depends on device model
Answer: C
Explanation:
Ansible tasks are idempotent, meaning they can be run multiple times without changing the end result unless a change is necessary.
What is a ‘fact’ in Ansible?
A. A hostname list
B. A YAML tag
C. A variable derived from a managed host
D. A custom plugin
Answer: C
Explanation:
Facts are variables collected from hosts, including details like IP, OS, interfaces, etc., which can be used in playbooks.
Which of the following is not a Junos automation tool?
A. SLAX
B. PyEZ
C. Ansible
D. SNMP
Answer: D
Explanation:
SNMP is a monitoring protocol, not an automation tool. SLAX, PyEZ, and Ansible are used for automation in Junos.
What does JET stand for?
A. Juniper Enterprise Tools
B. Junos Extensible Toolkit
C. Junos External Transport
D. JSON Encoded Translator
Answer: B
Explanation:
JET stands for Junos Extensible Toolkit, allowing access to Junos OS APIs for automation and app integration.
Which of the following is a Python automation script type supported in Junos?
A. system.py
B. op script
C. start script
D. py-config
Answer: B
Explanation:
Operational (op) scripts in Python are supported in Junos for custom automation of operational commands.
What does NETCONF stand for?
A. Network Configuration Framework
B. Network Control Format
C. Network Configuration Protocol
D. Net Configuration Formatter
Answer: C
Explanation:
NETCONF (Network Configuration Protocol) is used for managing network devices using XML-based data models.