CDP Containerization & Orchestration Flashcards

Which command is used to scale a Kubernetes Deployment to 5 replicas using kubectl?

Answer: kubectl scale deployment --replicas=5

The `kubectl scale` command adjusts the number of replicas for a deployment, replicaset, or statefulset.

In Docker Compose, what does the `depends_on` directive control?

Answer: The startup order of services

The `depends_on` directive specifies that one service should start only after the listed services have started.

What is a Kubernetes DaemonSet used for?

Answer: Ensuring one pod runs on every (or selected) node in the cluster

A DaemonSet ensures that a copy of a pod runs on all (or some) nodes, commonly used for log collectors or monitoring agents.

Which Kubernetes object should you use to manage stateful applications requiring stable storage and network identity?

Answer: StatefulSet

StatefulSets maintain a sticky identity for each pod and are designed for stateful applications that require stable, persistent storage.

What does a Kubernetes Horizontal Pod Autoscaler (HPA) use by default to determine when to scale pods?

Answer: CPU utilization

By default, HPA scales the number of pod replicas based on observed CPU utilization relative to a target threshold.

In a DevOps container pipeline, what is the recommended practice for tagging Docker images pushed to production?

Answer: Use immutable version tags such as git commit SHA or semantic version

Immutable tags like commit SHA or semantic versions ensure reproducibility and prevent silent overwrites that occur with mutable tags like `latest`.