Top 10 Common DevOps/SRE Interview Questions and Answers on Kubernetes Best Practices

1. How Do You Set Resource Requests and Limits in Kubernetes?

Resource requests ensure a minimum amount of resources (CPU/Memory) for a container, while limits enforce the maximum resources a container can consume. This helps with efficient resource allocation and prevents resource contention.

Example:

resources:
  requests:
    memory: "256Mi"
    cpu: "500m"
  limits:
    memory: "512Mi"
    cpu: "1000m

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2. Why is Namespace Important in Kubernetes?

Namespaces allow you to partition a single Kubernetes cluster into multiple virtual clusters, providing isolation between different teams or projects. They are useful for managing resource quotas and policies.

Example:

kubectl create namespace dev

3. How Do You Ensure High Availability in Kubernetes?

Use multi-zone clusters with redundant control plane components. Distribute workloads across multiple nodes and regions, ensuring no single point of failure.

Example:

• Deploy an application using a Deployment with replicas spread across nodes