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Deploying applications →hardMultiple ChoiceObjective-mapped

PCD Deploying applications Practice Question

This PCD practice question tests your understanding of deploying applications. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: app
        image: gcr.io/my-project/my-app:v1
        readinessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 5
          periodSeconds: 10
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 30

A developer deployed the Kubernetes Deployment shown. The application takes about 45 seconds to fully initialize and respond on the /healthz endpoint. What problem will occur with this configuration?

Exhibit

Refer to the exhibit.

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: app
        image: gcr.io/my-project/my-app:v1
        readinessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 5
          periodSeconds: 10
        livenessProbe:
          httpGet:
            path: /healthz
            port: 8080
          initialDelaySeconds: 30
          periodSeconds: 30

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

✓

The liveness probe will start too early and cause the pod to be restarted before it becomes ready.

The liveness probe has an initialDelaySeconds of 30 seconds, which is less than the application's initialization time of 45 seconds. Therefore, the liveness probe will start checking the /healthz endpoint at 30 seconds, fail, and Kubernetes will restart the pod before it becomes ready. The readiness probe does not prevent the liveness probe from running and causing restarts.

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.

  • ✗

    The readiness probe will never succeed, and the pod will be removed from service.

    Why it's wrong here

    It will succeed after the app is ready.

  • ✗

    The deployment will not create any pods because of a syntax error.

    Why it's wrong here

    The syntax is valid.

  • ✓

    The liveness probe will start too early and cause the pod to be restarted before it becomes ready.

    Why this is correct

    Correct: Liveness probe at 30s will fail, and after three failures the pod restarts, preventing it from ever becoming ready.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The pod will be marked ready immediately because the readiness probe uses the same endpoint as liveness.

    Why it's wrong here

    Readiness probe starts earlier but fails until the app is ready.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Google Cloud often tests the distinction between liveness and readiness probes in GKE. The trap here is that candidates assume both probes behave the same way or that a failing readiness probe prevents the liveness probe from running, when in fact liveness probes operate independently and can restart the pod before readiness succeeds.

Detailed technical explanation

How to think about this question

Kubernetes liveness probes have a default initialDelaySeconds of 0 if not specified, meaning the first probe runs immediately after the container starts. In contrast, readiness probes also default to 0, but the key issue is that a failing liveness probe triggers a container restart, which resets the initialization timer and creates a crash loop. A real-world scenario is deploying a Java application with a slow startup; without setting initialDelaySeconds on the liveness probe, the pod will be repeatedly killed before it can serve traffic.

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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.

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 PCD question test?

Deploying applications — This question tests Deploying applications — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The liveness probe will start too early and cause the pod to be restarted before it becomes ready. — The liveness probe has an initialDelaySeconds of 30 seconds, which is less than the application's initialization time of 45 seconds. Therefore, the liveness probe will start checking the /healthz endpoint at 30 seconds, fail, and Kubernetes will restart the pod before it becomes ready. The readiness probe does not prevent the liveness probe from running and causing restarts.

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

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

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jul 4, 2026

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This PCD practice question is part of Courseiva's free Google Cloud 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 PCD exam.