JNCIA-DevOps Python And PyEZ Practice Question
Which TWO of the following are valid ways to instantiate a PyEZ Device object in Python, providing connection parameters? (Choose two)
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
✓
dev = Device(host='192.168.1.1', user='admin', password='secret')
PyEZ Device can take explicit keyword arguments or read from configuration files/environment variables.
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', user='admin', password='secret')
Why this is correct
Correct. Explicit keyword arguments are standard for initializing a Device.
- ✗
dev = Device.connect('192.168.1.1')
Why it's wrong here
Incorrect. The class is instantiated directly as Device(...) followed by dev.open().
- ✗
dev = Device.from_cli('192.168.1.1')
Why it's wrong here
Incorrect. from_cli is not a valid Device constructor method.
- ✗
dev = Device(database='candidate')
Why it's wrong here
Incorrect. Database is a parameter for the Config utility, not the Device constructor.
- ✓
dev = Device('192.168.1.1', user='admin', ssh_private_key='/path/to/key')
Why this is correct
Correct. PyEZ accepts SSH private keys for authentication.
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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.