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Updated: Jul 21, 2026

No. of Questions: 66 Questions & Answers with Testing Engine

Download Limit: Unlimited

Choosing Purchase: "Online Test Engine"
Price: $69.00 

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JN0-421 Practice Q&A's

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Juniper JN0-421 Exam Topics:

SectionObjectives
Platform Automation OverviewIdentify concepts, general features, or functionality of Junos platform automation
  • MGD-based automation
  • Telemetry concepts
  • JSD-based automation
Junos Automation ScriptsDescribe the concepts, benefits, or operation of automation scripts for Junos
  • Commit, Op, Event, or SNMP scripts
  • Python
  • SLAX
Stateful Configuration (Ansible/SALT)Describe how to use Ansible for automating Junos
  • Playbooks
  • Templates (Jinja2)
  • Describe how to use SALT for automating Junos
  • Tower
  • Pillar
  • Runner
Juniper Extension ToolkitIdentify the concepts, general features, or functionality of the Juniper Extension Toolkit
  • Service APIs
  • gRPC/gNMI (network management interface)
  • Notification APIs
  • Fast Programmatic Configuration (Ephemeral DBs)
Data Serialization and TemplatingDescribe the concepts, benefits, or operation of data serialization
  • YAML
  • JSON
  • Jinja2
  • XML
YANG/OpenConfigIdentify the concepts and general features of Junos support for YANG models
  • Implementation concepts
NETCONF/XML APIDescribe the concepts, benefits, or operation of automation access methods
  • XML API
  • NETCONF
  • REST API
PythonDescribe Python tools for automating Junos
  • PyEZ
  • RPCs
  • PyEZ exception handling
  • REST
  • JSNAPy
  • Jinja2

Reference: https://www.juniper.net/us/en/training/certification/certification-tracks/devops?tab=jncis-devops

Juniper JN0-421 Exam Certification Details:

Exam NameAutomation and DevOps Specialist
Exam CodeJN0-421 JNCIS-DevOps
Sample QuestionsJuniper JN0-421 Sample Questions
Exam Price$300 USD
Recommended TrainingJunos Platform Automation and DevOps (JAUT)
Exam RegistrationPEARSON VUE
Passing ScoreVariable (60-70% Approx.)
Duration90 minutes
Number of Questions65

Juniper JN0-421 Exam Overview:

Certification Vendor:Juniper Networks
Exam Name:Automation and DevOps, Specialist (JNCIS-DevOps)
Exam Number:JN0-421
Related Certifications:Juniper Networks Certified Specialist, Automation and DevOps (JNCIS-DevOps)
Certificate Validity Period:3 years
Available Languages:English
Exam Format:Multiple Choice
Exam Duration:90 minutes
Real Exam Qty:65
Sample Questions:Juniper JN0-421 Sample Questions
Exam Way:Pearson VUE testing centers and Pearson VUE online proctored delivery.
Pre Condition:Valid JNCIA-DevOps certification is required.
Official Syllabus URL:https://www.juniper.net/us/en/training/certification/tracks/devops/jncis-devops.html

Juniper JN0-421 Exam Syllabus Topics:

SectionObjectives
Python Automation- Python Tools for Junos Automation
  • 1. PyEZ
  • 2. PyEZ exception handling
  • 3. Jinja2 templates
  • 4. RPCs
  • 5. REST integration
  • 6. JSNAPy
Junos Automation Scripts- Automation Script Concepts
  • 1. Translation scripts
  • 2. Event scripts
  • 3. Operational scripts
  • 4. Python scripting
  • 5. SLAX scripting
  • 6. SNMP scripts
  • 7. Commit scripts
NETCONF and XML API- Automation Access Methods
  • 1. XML API
  • 2. REST API
  • 3. NETCONF
Automation Frameworks- Salt for Junos Automation
  • 1. Runner
  • 2. Pillar
- Ansible for Junos Automation
  • 1. Jinja2 templates
  • 2. Playbooks
  • 3. Ansible Tower
YANG and OpenConfig- Data Modeling and Open Standards
  • 1. OpenConfig
  • 2. YANG models
  • 3. Junos implementation concepts
Data Serialization and Templating- Serialization Formats and Templates
  • 1. XML
  • 2. JSON
  • 3. YAML
  • 4. Jinja2
Platform Automation Overview- Junos Platform Automation Concepts
  • 1. JSD-based automation
  • 2. MGD-based automation
  • 3. Telemetry concepts (gRPC, gNMI, native telemetry)

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Frequently Asked Questions

What kinds of study material TopExamCollection provides?

Test Engine: JN0-421 study test engine can be downloaded and run on your own devices. Practice the test on the interactive & simulated environment.
PDF (duplicate of the test engine): the contents are the same as the test engine, support printing.

How long can I get the JN0-421 products after purchase?

You will receive an email attached with the JN0-421 study material within 5-10 minutes, and then you can instantly download it for study. If you do not get the study material after purchase, please contact us with email immediately.

How does your Testing Engine works?

Once download and installed on your PC, you can practice JN0-421 test questions, review your questions & answers using two different options' practice exam' and 'virtual exam'.
Virtual Exam - test yourself with exam questions with a time limit.
Practice Exam - review exam questions one by one, see correct answers.

Can I get the updated JN0-421 study material and how to get?

Yes, you will enjoy one year free update after purchase. If there is any update, our system will automatically send the updated study material to your payment email.

What's the applicable operating system of the JN0-421 test engine?

Online Test Engine can supports Windows / Mac / Android / iOS, etc., because it is the software based on WEB browser. You can use it on any electronic device and practice with self-paced.
Online Test Engine supports offline practice, while the precondition is that you should run it with the internet at the first time.
Self Test Engine is suitable for windows operating system, running on the Java environment, and can install on multiple computers.
PDF Version: can be read under the Adobe reader, or many other free readers, including OpenOffice, Foxit Reader and Google Docs.

How often do you release your JN0-421 products updates?

All the products are updated frequently but not on a fixed date. Our professional team pays a great attention to the exam updates and they always upgrade the content accordingly.

Do you have money back policy? How can I get refund if fail?

Yes. We have the money back guarantee in case of failure by our products. The process of money back is very simple: you just need to show us your failure score report within 60 days from the date of purchase of the exam. We will then verify the authenticity of documents submitted and arrange the refund after receiving the email and confirmation process. The money will be back to your payment account within 7 days.

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