200-901 Application Deployment and Security Practice Question
This 200-901 practice question tests your understanding of application deployment and security. 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.
A developer needs to securely store API keys for use in a CI/CD pipeline. Which best practice should be followed?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use built-in pipeline secrets or environment variables.
Option C is correct because CI/CD platforms (e.g., Jenkins, GitLab CI, GitHub Actions) provide built-in mechanisms to store secrets as encrypted environment variables or pipeline secrets. These values are masked in logs and never exposed in source code, ensuring API keys remain confidential throughout the pipeline execution.
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.
✗
Share the keys via email to the team.
Why it's wrong here
Email is not encrypted and keys could be intercepted or exposed.
✗
Hardcode the keys in the source code.
Why it's wrong here
Hardcoding exposes secrets to anyone with repository access and is not secure.
✓
Use built-in pipeline secrets or environment variables.
Why this is correct
Pipeline secrets are encrypted and not exposed in logs, providing secure storage.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Store the keys in a JSON file committed to the repository.
Why it's wrong here
Committing secrets to the repository makes them visible to all users with access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that storing secrets in a separate configuration file (like a JSON or .env file) is acceptable as long as it is not committed, but the trap is that any file-based storage in the repository—even if ignored—risks accidental exposure, whereas pipeline secrets are designed specifically for secure injection without file persistence.
Detailed technical explanation
How to think about this question
CI/CD secrets are typically encrypted at rest using platform-specific key management (e.g., AWS KMS, Azure Key Vault) and injected as environment variables at runtime, not stored in the pipeline configuration file. For example, GitHub Actions uses encrypted secrets that are decrypted only when the workflow runs, and they are automatically masked in logs. This approach aligns with the principle of least privilege and ensures secrets are never persisted in artifacts or logs.
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 network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
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.
Application Deployment and Security — This question tests Application Deployment and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use built-in pipeline secrets or environment variables. — Option C is correct because CI/CD platforms (e.g., Jenkins, GitLab CI, GitHub Actions) provide built-in mechanisms to store secrets as encrypted environment variables or pipeline secrets. These values are masked in logs and never exposed in source code, ensuring API keys remain confidential throughout the pipeline execution.
What should I do if I get this 200-901 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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Question Discussion
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