AZ-400 Deployment Patterns 5

Question 1

When using the 'rolling' deployment strategy in an Azure Pipelines YAML deployment job, what does the 'maxParallel' property control?

Accepted Answer

Maximum number of targets updated simultaneously in each rolling batch

Answer

maxParallel defines how many targets (VMs, servers) are updated at the same time in each rolling wave, balancing speed and availability.

Question 2

You need to deploy a new API version while keeping the old version live for backward compatibility. Which Azure API Management feature supports this pattern?

Accepted Answer

API versioning with multiple version sets and routing

Answer

Azure API Management supports versioning via URL path, header, or query string, allowing multiple API versions to coexist and route independently.

Question 3

In a multi-stage Azure pipeline, what is the correct way to pass a secret output from one stage to a downstream stage?

Accepted Answer

Use pipeline variables with isOutput=true and mark as secret, then reference via dependencies.

Answer

Setting isOutput=true on a task variable and referencing it via the dependencies context in a later stage passes values across stages; secrets can be mapped as secret variables.

Question 4

A deployment fails halfway through a rolling update in Kubernetes, leaving some pods on v1 and some on v2. What is the fastest safe remediation?

Accepted Answer

Run 'kubectl rollout undo deployment/<name>' to revert to the previous ReplicaSet

Answer

'kubectl rollout undo' reverts the deployment to its previous recorded state using the saved ReplicaSet, quickly restoring all pods to v1.

Question 5

Which deployment pattern involves routing production traffic to a new version while using the production data set — but never exposing results to users until manually promoted?

Accepted Answer

Shadow (dark launch) deployment

Answer

Shadow deployments send real production traffic to the new version silently; responses are discarded and users see only the live service until promotion.

AZ-400 Practice Test

AZ-400 Practice Test

AZ-400 Deployment Patterns 5