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Ensure solution and operations reliability →hardMultiple ChoiceObjective-mapped

Google PCA Ensure solution and operations reliability Practice Question

This PCA practice question tests your understanding of ensure solution and operations reliability. 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

gcloud container clusters describe prod-cluster --zone=us-central1-a
...
nodePools:
- config:
    machineType: n1-standard-4
    oauthScopes:
    - https://www.googleapis.com/auth/devstorage.read_only
    - https://www.googleapis.com/auth/logging.write
    - https://www.googleapis.com/auth/monitoring
  initialNodeCount: 3
  management:
    autoRepair: true
    autoUpgrade: true
...
addonsConfig:
  networkPolicyConfig:
    disabled: false
...
networkPolicy:
  enabled: true
  provider: CALICO
...
  subnetwork: default

Refer to the exhibit. A GKE cluster named 'prod-cluster' has network policy enabled with Calico. A deployment in the cluster uses a ServiceAccount that needs to pull images from a private Container Registry in the same project. Despite correct configuration of ImagePullSecrets, pods fail to pull images with 'AccessDenied' errors. What is the most likely cause?

Clue words in this question

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

  • Clue: "most likely"

    Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

Question 1hardmultiple choice
Full question →

Exhibit

gcloud container clusters describe prod-cluster --zone=us-central1-a
...
nodePools:
- config:
    machineType: n1-standard-4
    oauthScopes:
    - https://www.googleapis.com/auth/devstorage.read_only
    - https://www.googleapis.com/auth/logging.write
    - https://www.googleapis.com/auth/monitoring
  initialNodeCount: 3
  management:
    autoRepair: true
    autoUpgrade: true
...
addonsConfig:
  networkPolicyConfig:
    disabled: false
...
networkPolicy:
  enabled: true
  provider: CALICO
...
  subnetwork: default

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 node service account lacks storage.objectViewer role on the registry bucket.

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

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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 ImagePullSecret is not correctly base64-encoded.

    Why it's wrong here

    The error is AccessDenied, not Unauthorized or ImagePullSecret errors. If the secret were malformed, the error would typically be different.

  • ✗

    The network policy blocks egress traffic to the Container Registry's endpoints.

    Why it's wrong here

    Network policies in GKE are ingress- or egress-based; by default, if no egress policy is defined, all egress is allowed. The error is AccessDenied, not network timeout.

  • ✗

    The cluster's private cluster feature prevents access to external registries.

    Why it's wrong here

    The exhibit does not indicate a private cluster; even if it were, private clusters can still pull images from external registries via Cloud NAT or VPC peering.

  • ✓

    The node service account lacks storage.objectViewer role on the registry bucket.

    Why this is correct

    The node's OAuth scopes include devstorage.read_only, but that only grants access to Storage objects if the service account has the necessary IAM permissions. The node's default service account may not have the required roles.

    Clue confirmation

    The clue word "most likely" 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

Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.

Detailed technical explanation

How to think about this question

This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.

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.
  • Use explanations to understand the rule behind the answer.

TExam Day Tips

  • Underline the problem statement mentally.
  • 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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.

What to study next

Got this wrong? Here's your next step.

Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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FAQ

Questions learners often ask

What does this PCA question test?

Ensure solution and operations reliability — This question tests Ensure solution and operations reliability — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The node service account lacks storage.objectViewer role on the registry bucket.

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

Identify which PCA exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

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 PCA 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 PCA exam.