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Configuring access within a cloud solution environment →hardMultiple ChoiceObjective-mapped

Quick Answer

The answer is that the IAM condition fails because resource.name requires the numeric project ID, not the project name. This is the most likely cause of the access denial, as the condition `resource.name.startsWith('projects/my-project')` will never match a Google Cloud Storage object’s resource.name, which always uses the numeric project ID—for example, `projects/123456789`. On the Google Professional Cloud Security Engineer exam, this tests your understanding of how IAM conditions interact with resource attributes, a common trap where engineers mistakenly use the human-readable project name instead of the system-assigned numeric ID. The key insight is that while many IAM policies accept the project name, the `resource.name` attribute for storage objects is strictly numeric. To remember this, think: “Names are for people, numbers are for machines”—whenever you see `resource.name` in a condition, always use the numeric project ID.

PCSE Practice Question: Configuring access within a cloud solution environment

This PCSE practice question tests your understanding of configuring access within a cloud solution environment. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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": [
        "serviceAccount:sa@project.iam.gserviceaccount.com"
      ],
      "condition": {
        "title": "restrict_to_bucket",
        "expression": "resource.name.startsWith('projects/my-project/buckets/my-bucket/objects/')"
      }
    }
  ]
}
```

A security engineer created the following IAM policy for a service account. The service account reports that it cannot access objects in bucket 'my-bucket'. 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

Refer to the exhibit.
```json
{
  "bindings": [
    {
      "role": "roles/storage.objectViewer",
      "members": [
        "serviceAccount:sa@project.iam.gserviceaccount.com"
      ],
      "condition": {
        "title": "restrict_to_bucket",
        "expression": "resource.name.startsWith('projects/my-project/buckets/my-bucket/objects/')"
      }
    }
  ]
}
```

A
The condition is too restrictive and blocks all objects.
Why wrong: The condition would work if the project format were correct.
B
The service account lacks the storage.buckets.get permission.
Why wrong: ObjectViewer does not require buckets.get for object access.
C
The role is missing storage.objects.list permission.
Why wrong: ObjectViewer includes storage.objects.list.
D
The condition uses 'projects/my-project' but resource.name uses the numeric project ID.
This is the common mistake; resource.name contains project number, not project ID.

Full breakdown with real-world context →

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 uses 'projects/my-project' but resource.name uses the numeric project ID.

The condition in the policy uses `resource.name.startsWith('projects/my-project')`, but the `resource.name` attribute for Google Cloud Storage objects uses the numeric project ID (e.g., `projects/123456789`), not the project name. This causes the condition to never evaluate to true, effectively denying all access to the bucket's objects. Option D correctly identifies this mismatch as the root cause.

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 is too restrictive and blocks all objects.
Why it's wrong here
The condition would work if the project format were correct.
✗
The service account lacks the storage.buckets.get permission.
Why it's wrong here
ObjectViewer does not require buckets.get for object access.
✗
The role is missing storage.objects.list permission.
Why it's wrong here
ObjectViewer includes storage.objects.list.
✓
The condition uses 'projects/my-project' but resource.name uses the numeric project ID.
Why this is correct
This is the common mistake; resource.name contains project number, not project ID.
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

Google Cloud often tests the subtle difference between project name and numeric project ID in IAM conditions, tricking candidates who assume the human-readable name works everywhere in GCP resource identifiers.

Detailed technical explanation

How to think about this question

In Google Cloud IAM, `resource.name` for Cloud Storage objects follows the format `projects/_/buckets/BUCKET_NAME/objects/OBJECT_NAME`, but the `projects/` segment uses the numeric project ID (e.g., `123456789`), not the human-readable project name. This is a common pitfall because many other GCP resources (like Compute Engine instances) use the project name in `resource.name`. The condition `resource.name.startsWith('projects/my-project')` will never match any object, effectively creating a deny-all for object access.

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 PCSE question test?

Configuring access within a cloud solution environment — This question tests Configuring access within a cloud solution environment — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: The condition uses 'projects/my-project' but resource.name uses the numeric project ID. — The condition in the policy uses `resource.name.startsWith('projects/my-project')`, but the `resource.name` attribute for Google Cloud Storage objects uses the numeric project ID (e.g., `projects/123456789`), not the project name. This causes the condition to never evaluate to true, effectively denying all access to the bucket's objects. Option D correctly identifies this mismatch as the root cause.

What should I do if I get this PCSE 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.

About these practice questions

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Last reviewed: Jun 30, 2026

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