JNCIA-DevOps NETCONF And XML API Practice Question
You want to retrieve only the system hostname from the Junos running configuration using NETCONF. Which filtering technique is most efficient?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Subtree filtering using XML element tags matching the configuration hierarchy
Tag-based filtering allows requesting specific configuration hierarchies by including empty container tags in the <get-config> request.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Subtree filtering using XML element tags matching the configuration hierarchy
Why this is correct
Subtree filtering uses specific XML elements to mirror the configuration tree and filter the output.
- ✗
XPath expression filtering via the select attribute
Why it's wrong here
While XPath is supported, standard subtree tag filtering is the native Junos XML API approach for simple element extraction.
- ✗
Regular expression pattern matching within the <filter> attribute
Why it's wrong here
NETCONF subtree and XPath filters do not use generic regex pattern matching inside attributes.
- ✗
Retrieving the entire configuration and parsing it locally with a Python script
Why it's wrong here
Retrieving the full configuration is inefficient when only a specific leaf is needed.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Juniper Networks exam blueprint
This JNCIA-DevOps practice question is part of Courseiva's free Juniper Networks certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the JNCIA-DevOps exam.