hardMultiple ChoiceObjective-mapped
200-901 Practice Question: A developer is troubleshooting a CI/CD pipeline…
A developer is troubleshooting a CI/CD pipeline that automatically deploys configuration changes to network devices. The pipeline includes a stage that runs Python unit tests. Which of the following would be a valid test to include in that stage to validate the configuration before deployment?
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
✓
Test that the configuration file is valid JSON
Validating that the configuration is valid JSON is a simple unit test that can catch syntax errors early. The other options either require network access (which unit tests should avoid) or are not unit-level.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Test that the configuration can be applied to the device by sending it via NETCONF
Why it's wrong here
This requires network access (NETCONF) to test, which is not suitable for a unit test stage; unit tests should be isolated and fast.
- ✓
Test that the configuration file is valid JSON
Why this is correct
Correct. Validating that the configuration file is valid JSON is a fast, isolated unit test that catches syntax errors before deployment.
- ✗
Test that the configuration changes do not break connectivity by pinging the device after deployment
Why it's wrong here
This test requires network connectivity and is performed after deployment, so it is not a unit test and cannot be run before deployment.
- ✗
Test that the configuration adheres to company naming conventions using a regular expression
Why it's wrong here
Testing naming conventions with a regex is a form of policy validation, but it is not a unit test of the configuration's format; it is more of a linter check and could be combined with unit tests, but the primary unit test is to validate the file format.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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