AZ-400 Container and Microservices Deployment 3

Question 1

You need to configure canary deployments in AKS using NGINX Ingress. Which annotation controls the percentage of traffic routed to the canary deployment?

Accepted Answer

nginx.ingress.kubernetes.io/canary-weight

Answer

The canary-weight annotation specifies the integer percentage (0-100) of requests that NGINX Ingress forwards to the canary Ingress resource.

Question 2

When building Docker images in Azure Pipelines, what is the primary security benefit of using a multi-stage Dockerfile?

Accepted Answer

The final image excludes build tools and intermediate artifacts, reducing attack surface

Answer

Multi-stage builds copy only the compiled artifacts into a minimal final image, excluding compilers, SDKs, and build dependencies that could be exploited.

Question 3

Your microservices communicate over HTTP within AKS. You need mutual TLS (mTLS) between services without modifying application code. Which solution achieves this?

Accepted Answer

Deploy a service mesh such as Istio or Linkerd with automatic sidecar injection

Answer

Service meshes inject sidecar proxies that handle mTLS transparently, encrypting service-to-service traffic without requiring code changes.

Question 4

In Azure Container Apps, which scaling rule type allows the platform to scale based on the length of an Azure Service Bus queue?

Accepted Answer

Azure Service Bus scaler (KEDA-based)

Answer

Azure Container Apps uses KEDA under the hood, and the Service Bus scaler triggers scaling based on queue/topic message count or backlog.

Question 5

You are configuring Pod Disruption Budgets (PDB) for a critical microservice with 5 replicas. Setting minAvailable to 4 means:

Accepted Answer

At least 4 pods must remain running during voluntary disruptions like node drains

Answer

A PDB with minAvailable: 4 prevents voluntary disruptions (drains, evictions) from proceeding if they would leave fewer than 4 healthy pods.

AZ-400 Practice Test

AZ-400 Practice Test

AZ-400 Container and Microservices Deployment 3