JNCIA-DevOps Python And PyEZ Practice Question
An automation engineer is writing a Python script using Juniper PyEZ to connect to a Junos device. Which context manager approach is best practice to ensure the Device session is properly closed even if an exception occurs?
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
✓
with Device(host="192.168.1.1", user="admin", passwd="secret") as dev:
Using the 'with Device(host=...) as dev:' context manager guarantees that the open() and close() methods are handled automatically, even if runtime errors occur inside the block.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
dev = Device(host="192.168.1.1"); dev.start_session()
Why it's wrong here
start_session is not a standard PyEZ Device method.
- ✓
with Device(host="192.168.1.1", user="admin", passwd="secret") as dev:
Why this is correct
The context manager automatically opens the connection upon entry and safely closes it upon exit.
- ✗
dev = Device(host="192.168.1.1"); dev.open(autoclose=True)
Why it's wrong here
autoclose is not a valid keyword argument for the open() method in PyEZ.
- ✗
dev = Device(host="192.168.1.1").connect()
Why it's wrong here
The connect() method does not exist on the Device class; open() is used instead.
About these practice questions
One of 307 original JNCIA-DevOps practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. 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.