- A
By default, data in Cloud Storage is encrypted at rest using Google-managed encryption keys.
Cloud Storage automatically encrypts all data at rest with Google-managed keys.
- B
Using a signed URL revokes the underlying object's ACL.
Why wrong: Signed URLs provide temporary access without changing ACLs; ACLs remain unchanged.
- C
Enabling uniform bucket-level access disables encryption at rest.
Why wrong: Uniform bucket-level access controls access but does not affect encryption.
- D
Customer-managed encryption keys (CMEK) can be used to control the encryption keys used to protect data.
CMEK allows customers to manage their own encryption keys via Cloud KMS.
- E
Bucket-level policies can restrict access to only compute instances with specific service accounts.
Why wrong: Bucket policies can restrict access based on service accounts, but not specific VMs; it's based on identity, not machine.
Quick Answer
The answer is that both default encryption and Customer-Managed Encryption Keys (CMEK) are valid options for protecting data at rest in Cloud Storage. This is correct because Cloud Storage automatically applies server-side encryption with Google-managed keys to all data at rest by default, requiring no user action, while CMEK allows you to control and manage the encryption keys yourself via Cloud KMS for an additional layer of governance. On the Google Professional Cloud Developer exam, this distinction tests your understanding of the shared responsibility model and the difference between Google’s default protection and customer-controlled key management. A common trap is assuming you must choose one or the other—both are true statements, but CMEK is an optional upgrade, not a replacement for default encryption. Remember the memory tip: “Default is automatic, CMEK is custom.”
PCD Integrating Google Cloud services Practice Question
This PCD practice question tests your understanding of integrating google cloud services. 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.
A company is using Cloud Storage to store sensitive customer data. They need to ensure data is encrypted at rest and access is controlled. Which TWO statements are true regarding data protection in Cloud Storage? (Choose two.)
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
By default, data in Cloud Storage is encrypted at rest using Google-managed encryption keys.
Option A is correct because Cloud Storage automatically encrypts all data at rest using server-side encryption with Google-managed encryption keys by default, without any additional configuration. This ensures that data is protected before it is written to disk and remains encrypted throughout its lifecycle.
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.
- ✓
By default, data in Cloud Storage is encrypted at rest using Google-managed encryption keys.
Why this is correct
Cloud Storage automatically encrypts all data at rest with Google-managed keys.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Using a signed URL revokes the underlying object's ACL.
Why it's wrong here
Signed URLs provide temporary access without changing ACLs; ACLs remain unchanged.
- ✗
Enabling uniform bucket-level access disables encryption at rest.
Why it's wrong here
Uniform bucket-level access controls access but does not affect encryption.
- ✓
Customer-managed encryption keys (CMEK) can be used to control the encryption keys used to protect data.
Why this is correct
CMEK allows customers to manage their own encryption keys via Cloud KMS.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Bucket-level policies can restrict access to only compute instances with specific service accounts.
Why it's wrong here
Bucket policies can restrict access based on service accounts, but not specific VMs; it's based on identity, not machine.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that uniform bucket-level access affects encryption or that signed URLs modify ACLs, when in fact these features operate on separate layers of the security model.
Detailed technical explanation
How to think about this question
Cloud Storage uses AES-256 or AES-128 encryption for data at rest, with keys managed either by Google (default), by the customer via Cloud KMS (CMEK), or by the customer themselves (CSEK). Uniform bucket-level access is an access control mechanism that disables per-object ACLs and enforces IAM policies at the bucket level, but it has no impact on encryption. Signed URLs generate a cryptographic token that grants time-limited access to a specific object, independent of ACLs, and do not modify the underlying ACL.
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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Integrating Google Cloud services — study guide chapter
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FAQ
Questions learners often ask
What does this PCD question test?
Integrating Google Cloud services — This question tests Integrating Google Cloud services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: By default, data in Cloud Storage is encrypted at rest using Google-managed encryption keys. — Option A is correct because Cloud Storage automatically encrypts all data at rest using server-side encryption with Google-managed encryption keys by default, without any additional configuration. This ensures that data is protected before it is written to disk and remains encrypted throughout its lifecycle.
What should I do if I get this PCD 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more ways this is tested on PCD
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company stores sensitive user data in Cloud Storage. They want to ensure that only authenticated users with the appropriate permissions can access the data, and that data is encrypted at rest. Which two steps should they take? (Choose TWO.)
easy- A.Configure a Customer-Managed Encryption Key (CMEK) in Cloud KMS.
- ✓ B.Enable default encryption on the bucket using Google-managed keys.
- ✓ C.Use IAM roles to grant access to specific users and groups.
- D.Set bucket-level public access prevention.
- E.Enable VPC Service Controls to restrict data access.
Why B: Option B is correct because Cloud Storage buckets are encrypted at rest by default using Google-managed keys, which satisfies the requirement for data encryption without additional configuration. Option C is correct because IAM roles provide fine-grained access control, ensuring only authenticated users with appropriate permissions can access the data.
Last reviewed: Jun 11, 2026
This PCD 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 PCD exam.
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