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Ensure solution and operations reliability →mediumMultiple ChoiceObjective-mapped

Google PCA Ensure solution and operations reliability Practice Question

This PCA practice question tests your understanding of ensure solution and operations reliability. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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

{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": [
        "user:alice@example.com",
        "group:viewers@example.com"
      ]
    },
    {
      "role": "roles/storage.objectCreator",
      "members": [
        "user:bob@example.com"
      ]
    }
  ],
  "etag": "BwXQ=="
}

A company uses the above IAM policy on a Cloud Storage bucket. They find that Bob can view objects in the bucket. Which statement explains this?

Question 1mediummultiple choice
Full question →

Exhibit

{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": [
        "user:alice@example.com",
        "group:viewers@example.com"
      ]
    },
    {
      "role": "roles/storage.objectCreator",
      "members": [
        "user:bob@example.com"
      ]
    }
  ],
  "etag": "BwXQ=="
}

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

✓

Bob is a member of the group viewers@example.com.

Option D is correct because the IAM policy shown includes a binding that grants the `roles/storage.objectViewer` role to the group `viewers@example.com`. If Bob is a member of that group, he inherits the permissions to view objects in the bucket. The policy explicitly lists this group as a principal, so Bob's ability to view objects is directly explained by his group membership.

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.

  • ✗

    There is a higher-level policy that grants Bob viewer access.

    Why it's wrong here

    Possible but not as direct as group membership.

  • ✗

    The etag is mismatched causing policy override.

    Why it's wrong here

    Etag is for concurrency control, not permission granting.

  • ✗

    The bucket has uniform bucket-level access disabled.

    Why it's wrong here

    Uniform bucket-level access does not affect IAM policies.

  • ✓

    Bob is a member of the group viewers@example.com.

    Why this is correct

    Group membership grants viewer access to Bob.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    The objectCreator role implicitly includes read access.

    Why it's wrong here

    objectCreator role only allows creating objects, not reading.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Google Cloud often tests the distinction between IAM roles and ACLs, and the trap here is that candidates may overlook the group membership in the policy and instead incorrectly attribute Bob's access to a higher-level policy or a misunderstanding of role permissions.

Detailed technical explanation

How to think about this question

Under the hood, Cloud Storage IAM roles are evaluated at the bucket level when uniform bucket-level access is enabled. The `roles/storage.objectViewer` role includes the `storage.objects.get` and `storage.objects.list` permissions, which allow viewing object metadata and contents. Group membership is resolved by Google Cloud's Identity and Access Management (IAM) system, which evaluates all policies attached to the resource, including inherited policies from the organization or project level.

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 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 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 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: Bob is a member of the group viewers@example.com. — Option D is correct because the IAM policy shown includes a binding that grants the `roles/storage.objectViewer` role to the group `viewers@example.com`. If Bob is a member of that group, he inherits the permissions to view objects in the bucket. The policy explicitly lists this group as a principal, so Bob's ability to view objects is directly explained by his group membership.

What should I do if I get this PCA 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: Jun 30, 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.