Jobs and CronJobs for batch processing in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to specify the kind of Kubernetes resource for a batch job.

Kubernetes

apiVersion: batch/v1
kind: [1]
metadata:
  name: example-job

Drag options to blanks, or click blank then click option'

ADeployment

BPod

CService

DJob

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Pod' or 'Deployment' instead of 'Job'.

The kind field specifies the type of Kubernetes resource. For batch jobs, it should be Job.

2fill in blank

medium

Complete the code to set the schedule for a CronJob to run every day at midnight.

Kubernetes

apiVersion: batch/v1
kind: CronJob
metadata:
  name: daily-job
spec:
  schedule: "[1]"

Drag options to blanks, or click blank then click option'

A0 12 * * *

B0 6 * * *

C0 0 * * *

D0 18 * * *

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing 12 with midnight, or using wrong hour values.

The schedule field uses cron syntax. 0 0 * * * means every day at midnight.

3fill in blank

hard

Fix the error in the container image name for the Job spec.

Kubernetes

spec:
  template:
    spec:
      containers:
      - name: batch-task
        image: [1]
      restartPolicy: Never

Drag options to blanks, or click blank then click option'

Abusybox:latest

Bbusybox

Cubuntu

Dnginx:latest

Attempts:

3 left

💡 Hint

Common Mistakes

Using image names without tags or incomplete names.

The image name should include a tag like :latest to specify the version. busybox:latest is correct.

4fill in blank

hard

Fill both blanks to create a Job spec that runs a command and never restarts the pod.

Kubernetes

spec:
  template:
    spec:
      containers:
      - name: task
        image: busybox:latest
        command: ["[1]", "[2]"]
      restartPolicy: Never

Drag options to blanks, or click blank then click option'

Aecho

Bsleep

CHello, World!

D3600

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'sleep' with a string message or mixing command and arguments.

The command echo 'Hello, World!' prints the message once. The restart policy Never means the pod won't restart after finishing.

5fill in blank

hard

Fill all three blanks to define a CronJob that runs a backup script every hour at minute 15.

Kubernetes

apiVersion: batch/v1
kind: CronJob
metadata:
  name: hourly-backup
spec:
  schedule: "[1]"
  jobTemplate:
    spec:
      template:
        spec:
          containers:
          - name: backup
            image: alpine:latest
            command: ["[2]", "[3]", "backup.sh"]
          restartPolicy: OnFailure

Drag options to blanks, or click blank then click option'

A15 * * * *

B/bin/sh

C-c

Dbackup.sh

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing cron syntax or command arguments.

The schedule 15 * * * * runs the job every hour at minute 15. The command /bin/sh -c backup.sh runs the backup script inside the container using the shell.