JNCIA-DevOps NETCONF And XML API Practice Question
When using NETCONF to edit a Junos configuration, you include the attribute operation="create" on an existing configuration leaf. What behavior does the device exhibit?
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
✓
The device returns an rpc-error indicating that the target data model element already exists.
The 'create' operation adds a configuration node only if it does not already exist; if it exists, it returns an error.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The attribute is ignored, and the operation defaults to merge.
Why it's wrong here
Junos strict NETCONF enforcement does not ignore invalid operation semantics.
- ✗
The configuration value is updated successfully.
Why it's wrong here
Updating an existing node with 'create' generates an error.
- ✓
The device returns an rpc-error indicating that the target data model element already exists.
Why this is correct
'create' fails if the item already exists.
- ✗
The existing node is deleted and recreated with the new value.
Why it's wrong here
That behavior belongs to the replace or overwrite operations.
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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.