Docker & Kubernetes Test 2

    Question 1: DOCKER- Inspecting Images

    Which command lists all Docker images on the local system?

    Question 2: KUBERNETES- Code Snippet (Service YAML)

    What type of Service is defined by this YAML?

    apiVersion: v1
kind: Service
metadata:
  name: myapp-service
spec:
  selector:
    app: myapp
  ports:
    - protocol: TCP
      port: 80
      targetPort: 8080
  type: ClusterIP

    Question 3: KUBERNETES- Ingress Purpose

    What is the main role of an Ingress in Kubernetes?

    Question 4: KUBERNETES- Code Snippet (Mount ConfigMap as Volume)

    What does this snippet achieve?

    volumes:
  - name: config-volume
    configMap:
      name: app-config
containers:
  - name: app
    image: myapp:latest
    volumeMounts:
      - name: config-volume
        mountPath: /etc/config

    Question 5: KUBERNETES- Code Snippet (Pod with Resource Limits)

    What does this configuration do?

    containers:
- name: myapp
  image: myapp:latest
  resources:
    requests:
      cpu: "250m"
      memory: "128Mi"
    limits:
      cpu: "500m"
      memory: "256Mi"

    Question 6: DOCKER- Code Snippet (Run Container With Port Mapping)

    What does this command do?

    docker run -d -p 8080:8080 myapp

    Question 7: KUBERNETES- ConfigMaps Purpose

    What is the purpose of a ConfigMap in Kubernetes?

    Question 8: KUBERNETES- Code Snippet (Ingress Example)

    What is the function of this YAML snippet?

    apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: myapp-ingress
spec:
  rules:
  - host: myapp.example.com
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: myapp-service
            port:
              number: 80

    Question 9: KUBERNETES- Secrets Base64 Encoding

    How must data in Kubernetes Secrets be stored?

    Question 10: KUBERNETES- Monitoring with Metrics Server

    What role does the Metrics Server play in Kubernetes monitoring?

    Question 11: DOCKER- Volumes Purpose

    Why are Docker volumes used?

    Question 12: KUBERNETES- Code Snippet (Apply Deployment)

    What does this command do?

    kubectl apply -f myapp-deployment.yaml

    Question 13: KUBERNETES- Network Policies

    What is the purpose of a NetworkPolicy in Kubernetes?

    Question 14: KUBERNETES- Code Snippet (Secret YAML)

    What is this YAML doing?

    apiVersion: v1
kind: Secret
metadata:
  name: db-secret
type: Opaque
data:
  DB_USER: YWRtaW4=
  DB_PASSWORD: cGFzc3dvcmQ=

    Question 15: KUBERNETES- Logging Basics

    By default, how are logs generated by Kubernetes pods accessed?

    Question 16: DOCKER- Code Snippet (Attach Volume)

    What does this command achieve?

    docker run -d -v /host/data:/app/data myapp

    Question 17: KUBERNETES- Scaling Pods

    How can you scale a Deployment named myapp-deploy to 5 replicas?

    Question 18: KUBERNETES- Code Snippet (Simple NetworkPolicy)

    What does this NetworkPolicy allow?

    apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
  name: allow-frontend
spec:
  podSelector:
    matchLabels:
      role: backend
  ingress:
  - from:
    - podSelector:
        matchLabels:
          role: frontend

    Question 19: KUBERNETES- Consume Secret as Environment Variable

    How can a pod use a Secret as an environment variable?

    Question 20: KUBERNETES- Centralized Logging Solutions

    Which of the following stacks is commonly used for centralized logging in Kubernetes?