- JN0-224 is 65 multiple-choice questions in 90 minutes, English only, no prerequisite required.
- Software references are pinned to Junos OS 24.2, Python 3.8.10, and PyEZ 2.6.3 - study those versions.
- Standard voucher is USD 200; qualifying Open Learning completers get a 75% discount, dropping the attempt to USD 50.
- Certification is valid three years; Open Learning attendance alone never counts toward renewal.
Overview: What This Cheat Sheet Covers
This page is a condensed, one-stop reference for the Juniper Networks Certified Associate, Automation and DevOps credential - the JNCIA-DevOps offered within the HPE Networking Certification Program. It exists so you can do a fast final review before exam day without re-reading every page of your notes. For the full breakdown of how to prepare from scratch, pair this with the JNCIA-DevOps Study Guide 2026, and if you still need to confirm eligibility before registering, check the JNCIA-DevOps Requirements page first.
Everything below is drawn from the current published exam facts for JN0-224. Nothing here is borrowed from any other credential that happens to share the acronym - if a fact isn't confirmed for this specific Juniper exam, it's left out.
Exam Snapshot: JN0-224 at a Glance
Keep this table open in a tab the night before your test. It's the fastest way to confirm you have the logistics right.
| Detail | Value |
|---|---|
| Exam Code | JN0-224 |
| Launch Date | February 17, 2025 |
| Question Count | 65 multiple-choice questions |
| Time Limit | 90 minutes |
| Language | English only |
| Prerequisite | None |
| Delivery | Pearson VUE test centers or OnVUE online proctoring |
| Standard Voucher Cost | USD 200 (Juniper Training Credits) |
| Open Learning Discount | 75% off, reducing an attempt to USD 50 |
| Certification Validity | 3 years |
For a deeper cost breakdown, including how the discount voucher differs from the standard voucher, see the JNCIA-DevOps Certification Cost 2026 guide.
The Five Domains at a Glance
JN0-224 is organized around five content areas. You won't see a public weighting breakdown published for each, so treat every domain as fair game and budget review time accordingly. A full walkthrough with sample scenarios lives in the JNCIA-DevOps Exam Domains 2026 guide - this section is just the compressed version.
Domain 1: Junos Automation Stack and DevOps Concepts
Covers the foundational automation stack on Junos devices and how NetDevOps practices apply to network operations.
- Know what "automation stack" means in the Junos context: OS, APIs, scripting layers, and toolchains working together
- Understand core DevOps concepts as they map onto network engineering, not software engineering
Domain 2: NETCONF/XML API
Tests your ability to interact with Junos devices via NETCONF sessions and interpret XML responses.
- Understand NETCONF's role as a management protocol for configuration and operational data
- Be comfortable reading and navigating XML output, including using XPath to locate specific elements
Domain 3: Data Serialization
Focuses on structured data formats used to exchange configuration and automation data.
- Know YAML and JSON syntax well enough to read, write, and troubleshoot malformed structures
- Understand how serialized data feeds into templating tools like Jinja2
Domain 4: Python/PyEZ
Tests scripting fundamentals plus the Juniper-specific PyEZ library for device automation.
- Be fluent in basic Python syntax, exception handling, and script structure
- Know core PyEZ objects and methods for connecting to and configuring Junos devices
- Understand JSNAPy for pre/post-change state snapshot comparisons
Domain 5: REST API
Covers the Junos REST API as an alternative interface for automating device interactions.
- Know how to enable and query the Junos REST API
- Be familiar with the API Explorer tool and using cURL to issue REST requests
Key Takeaway
Every domain touches a different automation interface - NETCONF, REST, and Python/PyEZ are three separate doors into the same Junos device. Don't study them in isolation; know how the same task (e.g., pulling interface state) looks through each interface.
Registration, Fees, and Vouchers
The registration mechanics matter as much as the technical content, because getting them wrong can cost you a wasted attempt or a missed discount window.
- The standard associate-level exam voucher costs USD 200, purchased through Juniper Training Credits.
- Open Learning candidates who qualify receive a 75% discount, bringing the effective cost of an attempt to USD 50.
- Free Open Learning includes six months of course access and virtual labs, but does not include an eBook.
- The Open Learning path has its own separate voucher assessment, which runs 80 minutes - a different length than the 90-minute certification exam itself.
- To keep the discount, you must be 18 or older, not be an HPE employee, complete the course, and score at least 70% on the voucher assessment within 60 days of initial registration. Up to three assessment attempts are permitted.
- That 70% threshold applies only to voucher eligibility - it has no bearing on the passing score of the actual JN0-224 certification exam.
- The discount voucher is redeemable only via online proctoring (OnVUE), and once issued, the certification exam must be scheduled and completed within a 30-day validity window.
For a line-by-line comparison of the standard versus discounted path, see the JNCIA-DevOps Certification Cost breakdown, and for what actually counts as a passing result on exam day, check the JNCIA-DevOps Passing Score 2026 article.
Software References You Must Know
JN0-224's published examination software references are specific version numbers - memorize them, because questions are written against this exact toolchain:
- Junos OS 24.2 - the operating system version referenced by exam content
- Python 3.8.10 - the scripting language version behind Domain 4 content
- PyEZ 2.6.3 - the Juniper Python automation library version
Training is built around these versions too: Introduction to Juniper Platform Automation and NetDevOps is the recommended (not mandatory) course tied to this exam. You can pass without taking it, but if you're new to Junos automation, working through it - or the equivalent Open Learning track - is the fastest way to see these exact tool versions in action. More on how to structure that prep is in the JNCIA-DevOps Training overview.
Retake Rules and Renewal Policy
These are the rules candidates most often get wrong, because they assume generic industry norms instead of checking the specifics.
- First failure: no mandatory waiting period - you can rebook and retake right away.
- Second or later failure: a 14 calendar day wait applies, starting the day after the failed attempt.
- After passing: you must wait 18 months before retaking the same exam again.
- Validity: the certification is valid for three years from the date earned.
- Renewal: renew before expiry by passing an eligible examination, or by completing an approved instructor-led or On-Demand course. Open Learning attendance alone does not satisfy renewal.
- Passing results are provisional pending validation - don't treat a pass screen as final until it's confirmed.
As of September 15, 2026, candidates use HPE sign-in credentials together with CertMetrics to schedule, manage, and launch written exams - a change worth double-checking against the latest JNCIA-DevOps Exam Dates 2026 scheduling notes before you book.
Who Hires for This Credential
Because JN0-224 sits at the intersection of network engineering and automation tooling, it's most relevant to roles that touch Junos infrastructure directly rather than general cloud DevOps positions. Typical hiring contexts include:
- Network engineering teams running Juniper (Junos-based) infrastructure who want in-house scripting and API capability instead of relying entirely on vendor support
- NetDevOps or network automation teams building configuration pipelines around NETCONF, REST, and Python tooling
- Service providers and enterprises standardizing pre/post-change validation using tools like JSNAPy
If you're evaluating whether this credential fits your career plans, the JNCIA-DevOps Jobs overview and the Is the JNCIA-DevOps Certification Worth It? analysis go into more depth on positioning, while the JNCIA-DevOps Salary Guide 2026 covers compensation considerations without relying on unverified figures.
A Quick Domain-by-Domain Review Order
If you only have a short runway before your exam date, sequence your remaining review by dependency - later domains build on earlier ones conceptually, even though the exam doesn't test them in strict order.
Domain 1 and Domain 3
- Refresh Junos automation stack concepts and NetDevOps terminology
- Drill YAML/JSON syntax until parsing errors are obvious at a glance
Domain 2
- Practice reading raw NETCONF/XML output and locating nodes with XPath
Domain 4
- Review Python exception handling and core PyEZ connection/config methods
- Walk through a JSNAPy snapshot comparison end to end
Domain 5
- Practice constructing REST calls with API Explorer and cURL against sample endpoints
This order works because Data Serialization concepts (YAML/JSON) resurface inside Jinja2 templating questions and PyEZ configuration payloads, so getting it solid early pays off in Domains 4 and 5. For a longer-horizon prep plan rather than a last-mile review, see the full JNCIA-DevOps Study Guide.
Test Day Mechanics
A few logistics worth confirming before you arrive at a Pearson VUE center or launch OnVUE:
- You have 90 minutes for 65 multiple-choice questions - that's roughly 80 seconds per question on average, though question difficulty won't be evenly distributed, so don't clock-watch too rigidly.
- The exam is offered in English only.
- No prerequisite certification is required to register.
- Bring valid ID matching your registration; closed-book rules mean no notes, phones, or reference material at your seat (or on your desk for OnVUE).
- Scheduling and exam management now runs through HPE sign-in and CertMetrics as of September 15, 2026 - make sure your account is set up before your scheduled slot, not the morning of.
If you're unsure whether your preparation level matches the actual difficulty of the exam, the How Hard Is the JNCIA-DevOps Exam? guide and the JNCIA-DevOps Pass Rate 2026 article both offer useful context before you lock in a date. And once you're ready to test your recall under timed conditions, running through practice questions on the main practice test site is a faster gut-check than re-reading notes.
Key Takeaway
Treat the 90-minute, 65-question format as fixed and non-negotiable - pace practice sessions on the practice test platform to that exact ratio so exam-day timing feels familiar, not surprising.
FAQ
JN0-224, launched February 17, 2025. It remains the current examination for the Juniper Networks Certified Associate, Automation and DevOps credential.
No. There is no prerequisite certification required to register for or take the exam.
The standard voucher is USD 200 through Juniper Training Credits. Candidates who complete Open Learning and meet eligibility criteria, including scoring at least 70% on a separate voucher assessment within 60 days, receive a 75% discount, reducing the cost to USD 50.
It's valid for three years. Renew before expiry by passing an eligible examination or completing an approved instructor-led or On-Demand course. Simply attending Open Learning does not count toward renewal.
There's no mandatory wait after a first failure. After a second or later failure, you must wait 14 calendar days, starting the day after the failed attempt, before retesting. After passing, you must wait 18 months before retaking the same exam.