- A
Add SSH keys to Cloud Build for private Git repos.
Why wrong: Cloud Build uses Cloud Source Repositories or connection via GitHub app.
- B
Use Cloud KMS to encrypt sensitive environment variables.
Encrypted variables are decrypted at build time.
- C
Use container image tags instead of digests in build configs.
Why wrong: Tags can be overwritten; digests ensure immutability.
- D
Store secrets in Cloud Build's default substitution variables.
Why wrong: Not encrypted.
- E
Restrict Cloud Build trigger creation to specific IAM roles.
Prevents unauthorized build triggers.
Question 180 of 999
Implement Cloud Build Security Best Practices for CI/CD
This PCD practice question tests your understanding of deploying applications. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which TWO security best practices should be implemented when using Cloud Build to deploy applications? (Choose 2.)
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Quick Answer
The answer is to restrict Cloud Build trigger creation to specific IAM roles and to avoid storing sensitive data in build configuration files. These two practices directly address the core security principle of least privilege and secret management in CI/CD pipelines. By limiting trigger creation to authorized roles, you prevent unauthorized users from initiating builds that could execute malicious code or access production environments. Similarly, storing secrets like API keys or passwords in build configuration files exposes them in plaintext within the source repository and build logs, violating Google Cloud’s recommendation to use Secret Manager or Cloud KMS. On the Google Professional Cloud Developer exam, this question tests your understanding of Cloud Build’s IAM integration and its lack of native secret encryption—a common trap is assuming Cloud Build encrypts variables by default or that image tags provide secure verification. Remember the mnemonic: “Triggers and secrets, not tags and plaintext” to avoid confusing digest-based image verification with tag-based security.
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
✓
Use Cloud KMS to encrypt sensitive environment variables.
Option B is correct because Cloud Build does not automatically encrypt environment variables stored in build config files or the console. Using Cloud KMS allows you to encrypt sensitive data like API keys or passwords, then decrypt them at build time via the `gcloud kms decrypt` step, ensuring secrets are never stored in plaintext.
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.
- ✗
Add SSH keys to Cloud Build for private Git repos.
Why it's wrong here
Cloud Build uses Cloud Source Repositories or connection via GitHub app.
- ✓
Use Cloud KMS to encrypt sensitive environment variables.
Why this is correct
Encrypted variables are decrypted at build time.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use container image tags instead of digests in build configs.
Why it's wrong here
Tags can be overwritten; digests ensure immutability.
- ✗
Store secrets in Cloud Build's default substitution variables.
Why it's wrong here
Not encrypted.
- ✓
Restrict Cloud Build trigger creation to specific IAM roles.
Why this is correct
Prevents unauthorized build triggers.
Clue confirmation
The clue word "best" 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
A common pitfall for this question is believing that SSH keys (option A) or container image tags (option C) are security best practices for Cloud Build. SSH keys should be avoided in favor of Cloud Source Repositories or other secure Git integrations. Tags are mutable, making them insecure; digests provide immutability. Additionally, storing secrets in default substitution variables (option D) is insecure because they are not encrypted. The correct best practices are using Cloud KMS for encrypting sensitive environment variables (B) and restricting trigger creation to specific IAM roles (E).
Detailed technical explanation
How to think about this question
Cloud Build triggers can be restricted by IAM roles such as `roles/cloudbuild.builds.builder` and `roles/cloudbuild.triggerViewer` to enforce least privilege. Under the hood, Cloud KMS uses envelope encryption where a data encryption key (DEK) is encrypted by a key encryption key (KEK) stored in KMS; the build step decrypts the DEK at runtime, keeping the KEK safe. A real-world scenario: a CI/CD pipeline deploying to production must ensure that database passwords are never exposed in build logs, which is achieved by decrypting them only during the build step.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PCD question test?
Deploying applications — This question tests Deploying applications — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud KMS to encrypt sensitive environment variables. — Option B is correct because Cloud Build does not automatically encrypt environment variables stored in build config files or the console. Using Cloud KMS allows you to encrypt sensitive data like API keys or passwords, then decrypt them at build time via the `gcloud kms decrypt` step, ensuring secrets are never stored in plaintext.
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.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
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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