Docker & Kubernetes Test 1

    Question 1: DOCKER- Purpose of Docker

    What is the primary purpose of Docker in modern development?

    Question 2: KUBERNETES- Purpose of Kubernetes

    What is the primary purpose of Kubernetes in modern applications?

    Question 3: KUBERNETES- Cluster Networking Basics

    In Kubernetes, what is the main principle of cluster networking?

    Question 4: KUBERNETES- Purpose of ConfigMaps

    What is the primary purpose of a ConfigMap in Kubernetes?

    Question 5: KUBERNETES- Horizontal Scaling Basics

    What does Horizontal Pod Autoscaler (HPA) do in Kubernetes?

    Question 6: DOCKER- Difference Between Image and Container

    Which statement correctly distinguishes Docker images from containers?

    Question 7: KUBERNETES- Key Components

    Which component is responsible for maintaining cluster state and managing workloads?

    Question 8: KUBERNETES- Service Types

    Which Kubernetes Service type exposes an application externally with a cloud provider’s load balancer?

    Question 9: KUBERNETES- Purpose of Secrets

    What is the primary purpose of a Kubernetes Secret?

    Question 10: KUBERNETES- Vertical Scaling

    What is the difference between vertical and horizontal scaling in Kubernetes?

    Question 11: DOCKER- Code Snippet (Dockerfile Basics)

    What is the purpose of this Dockerfile snippet?

    FROM openjdk:17
COPY target/app.jar app.jar
ENTRYPOINT ["java", "-jar", "app.jar"]

    Question 12: KUBERNETES- Code Snippet (Pod YAML)

    What does this YAML manifest define?

    apiVersion: v1
kind: Pod
metadata:
  name: myapp-pod
spec:
  containers:
  - name: myapp
    image: myapp:latest

    Question 13: KUBERNETES- Code Snippet (NodePort Service)

    What does this YAML define?

    apiVersion: v1
kind: Service
metadata:
  name: myapp-service
spec:
  type: NodePort
  selector:
    app: myapp
  ports:
    - port: 80
      targetPort: 8080
      nodePort: 30007

    Question 14: KUBERNETES- Code Snippet (ConfigMap YAML)

    What does this YAML define?

    apiVersion: v1
kind: ConfigMap
metadata:
  name: app-config
data:
  APP_MODE: "production"
  LOG_LEVEL: "info"

    Question 15: KUBERNETES- Code Snippet (HPA YAML)

    What does this YAML configure?

    apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: myapp-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: myapp
  minReplicas: 2
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 70

    Question 16: DOCKER- Build and Run Commands

    What is the correct sequence to build and run a Docker image named `myapp`?

    Question 17: KUBERNETES- Deployments

    What is the main purpose of a Deployment in Kubernetes?

    Question 18: KUBERNETES- DNS Service Discovery

    How do pods discover other services in Kubernetes?

    Question 19: KUBERNETES- Using ConfigMap in Pod

    How can a pod consume a ConfigMap?

    Question 20: KUBERNETES- Resource Requests & Limits

    Why are requests and limits important in pod resource definitions?