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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

```json
{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": [
        "allUsers"
      ]
    }
  ]
}
```

Refer to the exhibit. A Cloud Storage bucket has this IAM policy. What security recommendation should be made?

Question 1mediummultiple choice
Full question →

Exhibit

```json
{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": [
        "allUsers"
      ]
    }
  ]
}
```

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

✓

Remove the `allUsers` member and use signed URLs for public access.

The IAM policy grants `roles/storage.objectViewer` to `allUsers`, which makes the bucket's objects publicly readable by anyone on the internet. This is a security risk because it allows anonymous access without authentication or logging. The recommended practice is to remove the `allUsers` member and instead use signed URLs (which embed a time-limited access token) to grant temporary, controlled access to specific objects.

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.

  • ✓

    Remove the `allUsers` member and use signed URLs for public access.

    Why this is correct

    Signed URLs provide controlled, temporary access without making the bucket publicly accessible.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Change `allUsers` to `allAuthenticatedUsers` to allow only authenticated users.

    Why it's wrong here

    This still allows any Google account, which may be too permissive for most use cases.

  • ✗

    Enable uniform bucket-level access and update the IAM policy.

    Why it's wrong here

    Uniform bucket-level access is a precondition for using IAM policies, but it does not change the fact that `allUsers` grants public access.

  • ✗

    Remove the `roles/storage.objectViewer` role binding entirely.

    Why it's wrong here

    If public access is needed, this would break functionality; better to use signed URLs.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Google Cloud often tests the misconception that `allAuthenticatedUsers` is a secure alternative to `allUsers`, but the trap is that it still allows any authenticated identity (including attackers) to access the data, whereas signed URLs provide granular, revocable, and auditable access.

Detailed technical explanation

How to think about this question

Signed URLs use a cryptographic signature (HMAC-SHA256) generated with a service account key to create a time-bound URL that grants specific permissions (e.g., read or write) to a single object. Under the hood, the signature is verified by the Cloud Storage backend against the service account's private key, and the URL can be restricted by IP address or HTTP method. In a real-world scenario, this is critical for sharing sensitive data (e.g., financial reports) with external partners without exposing the bucket to the public internet.

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: Remove the `allUsers` member and use signed URLs for public access. — The IAM policy grants `roles/storage.objectViewer` to `allUsers`, which makes the bucket's objects publicly readable by anyone on the internet. This is a security risk because it allows anonymous access without authentication or logging. The recommended practice is to remove the `allUsers` member and instead use signed URLs (which embed a time-limited access token) to grant temporary, controlled access to specific objects.

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.