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Application Deployment →hardMultiple ChoiceObjective-mapped

CKAD Application Deployment Practice Question

This CKAD practice question tests your understanding of application deployment. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

Refer to the exhibit.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
spec:
  replicas: 3
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: nginx
        image: nginx:1.19
        ports:
        - containerPort: 80
        livenessProbe:
          httpGet:
            path: /health
            port: 80
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: 80
          initialDelaySeconds: 5
          periodSeconds: 5

The exhibit shows a Deployment configuration. The application's /health endpoint returns HTTP 200 only after 30 seconds, while /ready returns 200 immediately. After applying this Deployment, what is the expected behavior?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

  • Clue: "immediately / without restart"

    Why it matters: Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

Question 1hardmultiple choice
Full question →

Exhibit

Refer to the exhibit.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web
spec:
  replicas: 3
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: nginx
        image: nginx:1.19
        ports:
        - containerPort: 80
        livenessProbe:
          httpGet:
            path: /health
            port: 80
          initialDelaySeconds: 30
          periodSeconds: 10
        readinessProbe:
          httpGet:
            path: /ready
            port: 80
          initialDelaySeconds: 5
          periodSeconds: 5

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Pods will become ready quickly but will be restarted repeatedly until the liveness probe starts succeeding after 30 seconds.

Option D is correct because the readiness probe passes immediately (since /ready returns 200), so the Pod is marked Ready and added to the Service. However, the liveness probe fails initially (since /health returns non-200 for the first 30 seconds), causing the kubelet to restart the container repeatedly until the liveness probe starts succeeding after 30 seconds. This behavior is defined by Kubernetes: a failing liveness probe triggers container restarts, while a failing readiness probe only removes the Pod from Service endpoints.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Pods will become ready after 30 seconds when both probes pass.

    Why it's wrong here

    Readiness probe passes before 30s, so pods become ready early.

  • ✗

    Pods will never become ready because the liveness probe fails initially.

    Why it's wrong here

    Liveness probe does not affect readiness directly.

  • ✗

    Pods will never become ready because the readiness probe fails initially.

    Why it's wrong here

    Readiness probe /ready returns 200 immediately.

  • ✓

    Pods will become ready quickly but will be restarted repeatedly until the liveness probe starts succeeding after 30 seconds.

    Why this is correct

    Readiness probe passes, but liveness fails and causes restarts.

    Clue confirmation

    The clue word "immediately / without restart" in the question point toward this answer.

    Related concept

    Read the scenario before looking for a memorised answer.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates confuse the roles of liveness and readiness probes: a failing liveness probe causes restarts, not a failure to become ready, while a failing readiness probe prevents the Pod from receiving traffic but does not trigger restarts.

Detailed technical explanation

How to think about this question

Under the hood, the kubelet executes probes based on their configured initialDelaySeconds, periodSeconds, and failureThreshold. If no initialDelaySeconds is set (default 0), probes start immediately. The liveness probe's failure triggers a container restart via the container runtime (e.g., containerd), which resets the container's state and restarts the application process. In real-world scenarios, this pattern is common for applications with slow startup dependencies (e.g., database connections) where the readiness probe checks lightweight readiness (e.g., config loaded) while the liveness probe checks deeper health (e.g., database reachable).

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A practitioner preparing for the CKAD exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this CKAD question test?

Application Deployment — This question tests Application Deployment — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Pods will become ready quickly but will be restarted repeatedly until the liveness probe starts succeeding after 30 seconds. — Option D is correct because the readiness probe passes immediately (since /ready returns 200), so the Pod is marked Ready and added to the Service. However, the liveness probe fails initially (since /health returns non-200 for the first 30 seconds), causing the kubelet to restart the container repeatedly until the liveness probe starts succeeding after 30 seconds. This behavior is defined by Kubernetes: a failing liveness probe triggers container restarts, while a failing readiness probe only removes the Pod from Service endpoints.

What should I do if I get this CKAD question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "immediately / without restart". Time or reboot constraint — the correct answer must take effect right away without requiring a reboot or reload.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 11, 2026

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This CKAD practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CKAD exam.