AZ-204 Develop Azure compute solutions Practice Question
A report export service hosted on App Service returns intermittent 502 errors during deployment. The team wants zero-downtime release with validation before traffic moves. What should be implemented?
⚠ Common exam trap
Watch out — candidates often think restarting the plan or disabling health checks is a valid fix, but these actions cause downtime or remove safety nets, whereas deployment slots with health checks provide the required zero-downtime release and validation.
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
✓
Deploy to a staging slot, validate health, then swap
Deploying to a staging slot and then swapping with production ensures zero-downtime because the swap operation warms up the target slot (staging) before routing traffic to it. The health check validation before swap confirms the new release is stable, preventing 502 errors from reaching users. This approach leverages Azure App Service deployment slots, which support traffic routing and warm-up during swap.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deploy to a staging slot, validate health, then swap
Why this is correct
Slot swaps allow pre-production validation and reduce deployment interruption.
- ✗
Deploy directly to production during business hours
Why it's wrong here
Direct deployment increases outage risk.
- ✗
Restart the App Service plan before each deployment
Why it's wrong here
Restarting does not validate the new release and can cause downtime.
- ✗
Disable health checks
Why it's wrong here
Disabling health checks makes failures harder to detect.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-204 practice question is part of Courseiva's free Microsoft 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 AZ-204 exam.