AZ-400 Deployment Patterns 4

Question 1

A company wants to reduce risk by deploying changes to a small cluster of servers before the full fleet. This pattern is best described as:

Accepted Answer

Canary or ring deployment

Answer

Deploying to a small subset first (canary) or to progressively larger rings limits blast radius before fleet-wide rollout.

Question 2

In Azure Pipelines, which YAML keyword defines a deployment job that tracks environment history and supports deployment strategies?

Accepted Answer

deployment:

Answer

The 'deployment:' job type in Azure Pipelines YAML links to an environment, records deployment history, and supports strategy blocks like runOnce, rolling, or canary.

Question 3

What is the purpose of the 'postRouteTraffic' lifecycle hook in an Azure Pipelines canary strategy?

Accepted Answer

To execute steps after canary traffic has been routed, typically for monitoring or validation

Answer

postRouteTraffic runs after traffic is shifted to the canary, allowing teams to run smoke tests or observe metrics before deciding to roll out or roll back.

Question 4

You are implementing a deployment pipeline for a microservices app. Which practice ensures each service can be deployed independently without breaking consumers?

Accepted Answer

Using consumer-driven contract testing (e.g., Pact) before deployment

Answer

Consumer-driven contract tests verify that a service's API still satisfies its consumers' expectations, enabling safe independent deployments.

Question 5

An Azure release pipeline's pre-deployment gate queries Application Insights for the exception rate. The gate is configured with a 'Stabilization Time' of 5 minutes. What does this mean?

Accepted Answer

The gate waits 5 minutes after the previous stage finishes before starting evaluation

Answer

Stabilization time is a delay after the stage or trigger before the gate begins its first evaluation, giving the system time to settle.

AZ-400 Practice Test

AZ-400 Practice Test

AZ-400 Deployment Patterns 4