AZ-204 Develop Azure compute solutions Practice Question
A web app for a webhook processor needs separate staging and production environments. The team must warm up the new version before swapping traffic. Which App Service feature should be used?
⚠ Common exam trap
It's easy for candidates to confuse Always On with a warm-up mechanism, but Always On only prevents idle unload and does not provide environment separation or traffic swapping capabilities.
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
✓
Deployment slots
Deployment slots are the correct feature because they enable separate staging and production environments within the same App Service plan, allowing you to warm up the new version in a staging slot before performing a zero-downtime swap with the production slot. This directly supports the requirement for traffic swapping after warm-up, which is a core capability of slot-swapping in Azure App Service.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Deployment slots
Why this is correct
Deployment slots provide separate staging and production environments with distinct hostnames, and slot swap warms up the new version on the staging slot before routing production traffic to it, satisfying the warm-up requirement without downtime.
- ✗
Backup and restore
Why it's wrong here
Backup and restore copies an app's files, databases and configuration to a storage account for disaster recovery; it creates no second live environment and cannot warm up or swap traffic. It would be correct when recovering from data loss or corruption, not for staged deployment.
- ✗
App Service access restrictions
Why it's wrong here
App Service access restrictions allow or deny inbound traffic by IP address or virtual network rule; they do not provision a second environment or perform a warm-up swap. They would be correct for locking down who can reach an app, not for staging and production deployment.
- ✗
Always On only
Why it's wrong here
Always On only keeps the app loaded by preventing idle unload; it performs no warm-up and cannot swap slots. Staging and production separation with warm-up before traffic swap requires deployment slots, where Always On is merely a supporting setting on each slot.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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