JNCIA-DevOps Junos Automation Stack And DevOps Concepts Practice Question
A network engineer writes a Python script using Junos PyEZ to push a configuration change. The script uses the ConfigTable or Config class. What mechanism does PyEZ use under the hood to ensure the configuration lock is released even if the script encounters an unhandled exception?
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
✓
Python context managers ('with' statements) that automatically release locks and clean up session state upon exit.
Python context managers (using the 'with' statement) automatically handle acquiring and releasing locks and rolling back candidate changes on exception in PyEZ.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
NETCONF keepalive timers that drop the SSH session after 1 second.
Why it's wrong here
Keepalives monitor session health, not transaction locks.
- ✗
A UNIX cron job that reboots the router every 5 minutes.
Why it's wrong here
Rebooting routers via cron is not how PyEZ manages locks.
- ✓
Python context managers ('with' statements) that automatically release locks and clean up session state upon exit.
Why this is correct
Correct. PyEZ configuration context managers ensure proper cleanup and lock release.
- ✗
Hardware watchdog timers built into the Routing Engine ASIC.
Why it's wrong here
Watchdog timers handle hardware lockups, not software context cleanup.
Visual reference
About these practice questions
Courseiva writes every JNCIA-DevOps question from scratch — 307 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.