Cloud Function Secrets: Avoid Plain Text in Environment Variables
This PCD practice question tests your understanding of integrating google cloud services. 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.
Environment variables:
FOO: bar
DB_PASS: mypassword
A developer sets environment variables for a Cloud Function as shown. What is the security concern?
Exhibit
Refer to the exhibit.
Environment variables:
FOO: bar
DB_PASS: mypassword
A
The variable name FOO is too short and does not follow naming conventions.
Why wrong: The variable name FOO is syntactically valid and does not pose a security risk.
B
The variable DB_PASS should be set as a build variable instead.
Why wrong: Build variables are for build-time settings, not runtime secrets; the security concern is about exposure in plain text.
C
There is no encryption applied to environment variables.
Why wrong: Encryption at rest is not the primary issue; environment variables are not encrypted by default, but the main problem is that the password is visible in plain text.
D
The password is exposed in plain text and should be stored in Secret Manager.
The password is exposed in plain text in environment variables. It should be stored in Secret Manager to prevent unauthorized access.
The answer is to avoid plain text in environment variables and instead use Secret Manager for cloud function secret management. Storing sensitive data like passwords directly in environment variables exposes them in plain text within the Cloud Function’s configuration and logs, making them visible to anyone with access to the project or deployment history. On the Google Professional Cloud Developer exam, this tests your understanding of runtime security best practices, often appearing in scenario-based questions where a developer mistakenly uses environment variables for secrets. A common trap is confusing build-time variables with runtime variables—build variables are only available during deployment, not at function execution. Remember the mnemonic: "Secrets in the store, not in the door"—always pull secrets from Secret Manager at runtime, never hardcode them into environment variables.
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 password is exposed in plain text and should be stored in Secret Manager.
Option D is correct because storing a password in plain text in an environment variable exposes it to anyone with access to the function's configuration. Cloud Secret Manager should be used to store secrets securely. Option A is incorrect because the variable name FOO, while short, is syntactically valid and does not pose a security risk. Option B is incorrect because build variables are for build-time settings, not runtime secrets, and the security concern is about exposure, not where the variable is set. Option C is incorrect because encryption at rest is not applicable; environment variables are not encrypted by default, but the main issue is visibility, not encryption.
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 variable name FOO is too short and does not follow naming conventions.
Why it's wrong here
The variable name FOO is syntactically valid and does not pose a security risk.
✗
The variable DB_PASS should be set as a build variable instead.
Why it's wrong here
Build variables are for build-time settings, not runtime secrets; the security concern is about exposure in plain text.
✗
There is no encryption applied to environment variables.
Why it's wrong here
Encryption at rest is not the primary issue; environment variables are not encrypted by default, but the main problem is that the password is visible in plain text.
✓
The password is exposed in plain text and should be stored in Secret Manager.
Why this is correct
The password is exposed in plain text in environment variables. It should be stored in Secret Manager to prevent unauthorized access.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Identify which PCD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: The password is exposed in plain text and should be stored in Secret Manager. — Option D is correct because storing a password in plain text in an environment variable exposes it to anyone with access to the function's configuration. Cloud Secret Manager should be used to store secrets securely. Option A is incorrect because the variable name FOO, while short, is syntactically valid and does not pose a security risk. Option B is incorrect because build variables are for build-time settings, not runtime secrets, and the security concern is about exposure, not where the variable is set. Option C is incorrect because encryption at rest is not applicable; environment variables are not encrypted by default, but the main issue is visibility, not encryption.
What should I do if I get this PCD question wrong?
Identify which PCD exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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