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Exam AZ-303 topic 3 question 10 discussion

Actual exam question from Microsoft's AZ-303

Question #: 10
Topic #: 3

You have an Azure web app that runs in a Premium App Service plan.
Developers plan to update the app weekly.
You need to ensure that the app can be switched from the current version to the new version. The solution must meet the following requirements:
✑ Provide the developers with the ability to test the app in Azure prior to switching versions. Testing must use the same app instance.
✑ Ensure that the app version can be rolled back.
✑ Minimize downtime.
What should you do?

A. Create a deployment slot.
B. Copy the App Service plan.
C. Add an instance of the app to the scale set.
D. Create an Azure Active Directory (Azure AD) enterprise application.

Show Suggested Answer

Suggested Answer: A 🗳️
Azure Functions deployment slots allow your function app to run different instances called "slots". Slots are different environments exposed via a publicly available endpoint. One app instance is always mapped to the production slot, and you can swap instances assigned to a slot on demand.
There are a number of advantages to using deployment slots. The following scenarios describe common uses for slots:
✑ Different environments for different purposes: Using different slots gives you the opportunity to differentiate app instances before swapping to production or a staging slot.
✑ Easy fallbacks: After a swap with production, the slot with a previously staged app now has the previous production app. If the changes swapped into the production slot aren't as you expect, you can immediately reverse the swap to get your "last known good instance" back.

Prewarming -

Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-deployment-slots

by Schandra at Jan. 7, 2021, 6:25 p.m.

Comments

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xaccan

Highly Voted 4 years, 6 months ago

A is correct: https://docs.microsoft.com/en-us/azure/app-service/deploy-staging-slots

upvoted 24 times

Miffy

4 years, 5 months ago

The sample answer is correct, but not its explanation link. Yours is the good one. Thanks.

upvoted 5 times

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jd94

Highly Voted 4 years, 1 month ago

6/12/2021. Passed the exam. Deployment slot.

upvoted 6 times

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sandeepmalik

Most Recent 3 years, 4 months ago

In today's exam. Score 900+ Correct answer.

upvoted 1 times

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moon2351

3 years, 5 months ago

A is correct

upvoted 1 times

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nd78

3 years, 6 months ago

on Exam today 21st Jan, 2022

upvoted 1 times

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tomatosis

3 years, 7 months ago

On exam 23 Dec 2021, I chose the same

upvoted 1 times

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Dpejic

3 years, 8 months ago

On exam today 22/11/21 Score 839

upvoted 2 times

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edmacoar123

3 years, 8 months ago

On exam today 19/11/21. Correct answer. Score 860.

upvoted 2 times

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syu31svc

3 years, 11 months ago

When you deploy your web app, web app on Linux, mobile back end, or API app to Azure App Service, you can use a separate deployment slot instead of the default production slot when you're running in the Standard, Premium, or Isolated App Service plan tier. Deployment slots are live apps with their own host names. App content and configurations elements can be swapped between two deployment slots, including the production slot. https://docs.microsoft.com/en-us/azure/app-service/deploy-staging-slots A is correct

upvoted 2 times

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