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Design and plan a cloud solution architecture →mediumMultiple ChoiceObjective-mapped

Google PCA Design and plan a cloud solution architecture Practice Question

This PCA practice question tests your understanding of design and plan a cloud solution architecture. 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

Refer to the exhibit.

```json
{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": ["user:alice@example.com"],
      "condition": {
        "title": "only_bucket_a",
        "expression": "resource.name.startsWith('projects/_/buckets/bucket-a/')"
      }
    }
  ]
}
```

Refer to the exhibit. A user alice@example.com is unable to list objects in bucket 'bucket-b'. What is the most likely reason?

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.

Exhibit

Refer to the exhibit.

```json
{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": ["user:alice@example.com"],
      "condition": {
        "title": "only_bucket_a",
        "expression": "resource.name.startsWith('projects/_/buckets/bucket-a/')"
      }
    }
  ]
}
```

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 condition restricts access only to bucket-a.

Option A is correct because the IAM policy condition explicitly restricts access to resources with a name matching 'bucket-a'. Since the user is trying to list objects in 'bucket-b', the condition evaluates to false, and the IAM policy does not grant the required permissions. Without a matching condition, the effective permission set is empty, causing the list operation to fail.

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 condition restricts access only to bucket-a.

    Why this is correct

    The condition expression limits the role to buckets with names starting with 'bucket-a'.

    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.

  • ✗

    The IAM policy is missing the roles/storage.objectAdmin role.

    Why it's wrong here

    objectViewer is sufficient for listing objects; objectAdmin is not required.

  • ✗

    The condition expression is invalid.

    Why it's wrong here

    The expression is syntactically correct and valid for IAM conditions.

  • ✗

    The user needs the roles/storage.legacyBucketReader role.

    Why it's wrong here

    legacyBucketReader is not needed for listing objects; objectViewer is adequate.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Google Cloud often tests the nuance that IAM conditions can override role-based permissions, causing candidates to overlook the condition and focus only on the role assignment.

Detailed technical explanation

How to think about this question

IAM conditions use Common Expression Language (CEL) to evaluate resource attributes like resource.name. The resource.name attribute follows the pattern 'projects/_/buckets/BUCKET_NAME' for bucket-level operations. When a condition restricts access to a specific bucket, any request targeting a different bucket is denied even if the role itself would normally grant the permission. This is a key aspect of attribute-based access control (ABAC) in Google Cloud.

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?

Design and plan a cloud solution architecture — This question tests Design and plan a cloud solution architecture — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The condition restricts access only to bucket-a. — Option A is correct because the IAM policy condition explicitly restricts access to resources with a name matching 'bucket-a'. Since the user is trying to list objects in 'bucket-b', the condition evaluates to false, and the IAM policy does not grant the required permissions. Without a matching condition, the effective permission set is empty, causing the list operation to fail.

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.

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.