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This page has 20 Hard Difficulty Questions scenario questions for the JNCIA-DevOps exam, each with detailed explanations and wrong-answer analysis.

How should I approach JNCIA-DevOps scenario questions?

Read the full scenario before looking at the answer options. Identify the constraint or requirement in the scenario, then eliminate options that are generally true but wrong for this specific case. Scenario questions reward careful reading over pattern matching.

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Hard Difficulty Questions

Practise Juniper Networks Automation and DevOps, Associate (JNCIA-DevOps, JN0-224) (JNCIA-DevOps) practice questions — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps.

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JNCIA-DevOps

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Juniper Networks

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Scenario guide

How to approach hard difficulty questions

These are the questions most candidates get wrong. They require connecting multiple concepts, reading tricky output, or knowing edge-case behaviour that isn't on most study cards. Practising them trains you to operate under uncertainty — a necessary skill on the real exam.

Quick answer

Hard Difficulty Questions questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Practice scenarios

Question 1hardmultiple choice

Read the full REST/YANG explanation →

During a NETCONF session with a Junos device, an automation script issues an RPC to load a configuration. The device returns a response containing an <rpc-error> tag. What does this indicate?

A
The Junos routing engine is operating at 100% CPU capacity.
Why wrong: High CPU does not inherently generate NETCONF rpc-error elements unless a timeout occurs.
B
The NETCONF session has successfully terminated with a normal exit code.
Why wrong: Normal termination uses <close-session> and <ok>.
C
The physical optical link on the management port has failed.
Why wrong: Physical layer failures prevent TCP/SSH connection establishment, not RPC errors.
D
The configuration or RPC request failed validation, syntax checking, or execution constraints on the device.
Correct. <rpc-error> signals a failure in processing the request.

Hard Difficulty Questions

How to approach hard difficulty questions

Quick answer

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JNCIA-DevOps troubleshooting practice questions

Practice scenarios

During a NETCONF session with a Junos device, an automation script issues an RPC to load a configuration. The device returns a response containing an <rpc-error> tag. What does this indicate?

A Python script processes a YAML configuration template for Junos BGP neighbors. The configuration contains a multi-line banner string description. Which YAML block scalar indicator preserves newlines exactly as written in the text block?

An automation engineer is designing a deployment strategy for Junos devices using Git branches. Which branching strategy model aligns best with continuous delivery where feature branches are merged frequently into a shared integration branch that automatically triggers staging tests?

When parsing a Junos configuration snippet in YAML, an engineer notices a string value starting with a zero (e.g., '01234') that is unquoted. How do YAML parsers typically interpret this value?

In Git version control, which TWO commands are used to integrate changes from one branch into another? (Choose two)

You are writing a Python automation script that reads a Junos configuration file in JSON format. The JSON file contains duplicate keys within the same object scope. According to the JSON specification RFC 8259, how should a conforming JSON parser handle duplicate keys?

A Python script reads a Junos configuration snippet stored in YAML. The configuration uses YAML anchors and aliases to duplicate common routing policy definitions across multiple VRFs. When the script parses the file using yaml.safe_load(), what happens to the anchors and aliases?

Which THREE advanced features or methods are available on a PyEZ Device instance for session management and inspection? (Choose three)

Which THREE architectural features distinguish the Junos REST API from traditional CLI screen-scraping (CLI automation via expect scripts)? (Choose three)

When developing Python scripts that utilize PyEZ and Jinja2, which THREE best practices ensure robust and maintainable automation code? (Choose three)

An engineer is designing an automated failover script that needs to discard candidate configuration changes made via the Junos REST API. How should this discard action be performed?

An engineer is troubleshooting a script that updates Junos configuration via the REST API. The payload is sent as JSON, but the device returns a 415 Unsupported Media Type error. What is the root cause?

An administrator wants to fetch operational data representing interface statistics using the Junos REST API by issuing an HTTP GET request. Which URI structure correctly targets the 'get-interface-information' RPC via the REST API endpoint?

You are building a custom PyEZ application and need to catch exceptions specific to configuration parsing failures returned by Junos. Which exception class should your script import?

An administrator is planning an automation architecture using the Junos REST API. Which THREE statements are correct regarding its endpoints, authentication, and usage? (Choose three)

When configuring advanced options for the Junos REST API jpagent, which THREE parameters or sub-statements can be configured under the 'set system services jpagent' hierarchy? (Choose three)

When writing Jinja2 templates for Junos configurations, which THREE control flow or filtering constructs are valid? (Choose three)

Which THREE exceptions can be raised by PyEZ during script execution when interacting with a Junos device? (Choose three)

When designing a custom PyEZ Table and View mapping in Python, what configuration parameter in the YAML definition file specifies the RPC or CLI command executed to gather the raw data?