Pass the actual test with the help of JN0-421 study guide
Last Updated: Aug 28, 2026
No. of Questions: 66 Questions & Answers with Testing Engine
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The Juniper Automation and DevOps, Specialist (JNCIS-DevOps) exam is known for tricky wording and broad coverage. Working through 66 practice questions at Actualtests4sure exposes your weak spots before they can cost you on exam day.
| Certification Vendor: | Juniper Networks |
|---|---|
| Exam Name: | Juniper Automation and DevOps, Specialist (JNCIS-DevOps) |
| Exam Number: | JN0-421 |
| Related Certifications: | JNCIA-DevOps JNCIS-DevOps |
| Exam Duration: | 90 minutes |
| Exam Format: | Multiple choice, Multiple response, Scenario-based questions |
| Exam Price: | $300 USD (may vary by region) |
| Available Languages: | English |
| Real Exam Qty: | 60-65 |
| Certificate Validity Period: | 3 years |
| Recommended Training: | Juniper Networks Training (Automation & DevOps) |
| Exam Registration: | Pearson VUE Juniper Exams Juniper Certifications Registration |
| Sample Questions: | Juniper JN0-421 Sample Questions |
| Exam Way: | Online proctored or in-person test center via Pearson VUE |
| Pre Condition: | No formal prerequisite, but Juniper recommends JNCIA-DevOps knowledge before attempting this exam. |
| Official Syllabus URL: | https://www.juniper.net/us/en/training/certification/certification-tracks/automation-and-devops-track.html |
| Section | Objectives |
|---|---|
| Automation Fundamentals | - Automation concepts and use cases in networking - DevOps principles and workflows |
| CI/CD and Operational Automation | - Testing and validation of automation workflows - CI/CD pipelines in network automation |
| Scripting and Tooling | - Python for network automation - Git and version control basics for automation workflows - Ansible automation with Junos devices |
| Juniper Platforms and Junos Automation | - Commit scripts and event scripts - Junos OS automation features |
| APIs and Data Formats | - REST APIs and Junos REST API - Data formats (JSON, XML, YAML) |
The Juniper JN0-421 exam, officially titled Automation and DevOps, Specialist (JNCIS-DevOps), is the required test for earning the Juniper Automation and DevOps, Specialist (JNCIS-DevOps) certification, a credential at the Specialist level. Passing it validates the skills Juniper expects from certified professionals, and it can also support progress toward related credentials such as JNCIA-DevOps, JNCIS-DevOps.
The JN0-421 exam includes 60-65 questions, and you have 90 minutes to complete it. Before exam day, divide the available time by the question count so you know the pace you need to hold, and practice flagging time-consuming items for review instead of stalling on a single question. Timed sessions in the Actualtests4sure test engine are the easiest way to build that rhythm before it counts.
Juniper asks candidates to meet the following requirement before registering: No formal prerequisite, but Juniper recommends JNCIA-DevOps knowledge before attempting this exam.. Exam policies do change, so confirm the latest details on the official exam page at https://www.juniper.net/us/en/training/certification/certification-tracks/automation-and-devops-track.html before you book.
You can book your seat through the official registration channels below:
The JN0-421 exam is delivered in the following format: Online proctored or in-person test center via Pearson VUE.
Juniper recommends the following official training for this exam:
A course builds the theory; practice turns it into exam-day performance. Once you finish a class, the 66 practice questions from Actualtests4sure show you how the same knowledge appears in exam-style items.
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The Juniper Automation and DevOps, Specialist (JNCIS-DevOps) exam is organized into 5 major domains. Some of the key domains include:
Scroll up to the Exam Topics section for the complete breakdown, and use it to plan how much study time each domain deserves.
Question 1
Which command is valid for accessing a Junos device using the RESTful API on the default port?
A)
B)
C)
D)
A. Option D
B. Option B
C. Option A
D. Option C
Question 2
Which format does an Ansible playbook use?
A. XML
B. JSON
C. YAML
D. CSV
Question 3
Which command is used to execute an Ansible playbook?
A. ansible-playbook
B. ansible-vault
C. ansible-galaxy
D. ansible
Question 4
By default, Python event scripts and SNMP scripts configured on a Junos device execute as which user?
A. root
B. snmpd
C. nobody
D. wheel
Question 5
Click the Exhibit button.
Exhibit:
Referring to the exhibit, what should <CHANGEME> be replaced with to correctly print out the exception message Cannot connect to device?
A. ConnectError
B. CommitError
C. PermissionError
D. RpcError
Solutions:
| Question 1 Answer: D | Question 2 Answer: C | Question 3 Answer: A | Question 4 Answer: C | Question 5 Answer: A |
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