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CAS-004 Practice Question: Which two practices are essential for securing a…
Which two practices are essential for securing a CI/CD pipeline? (Choose two.)
⚠ Common exam trap
It's easy for candidates to confuse 'immutable tags' (Option D) as a security practice when it is actually a supply chain integrity mechanism, not a direct security control like code signing or vulnerability scanning.
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
✓
Implement code signing for all build artifacts.
Code signing ensures the integrity and authenticity of build artifacts, preventing tampering or injection of malicious code during the CI/CD pipeline. This practice verifies that artifacts originate from a trusted source and have not been altered, which is critical for secure software supply chain management.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Allow any developer to merge code into the main branch without review.
Why it's wrong here
Lack of review increases risk of malicious or flawed code.
- ✓
Implement code signing for all build artifacts.
Why this is correct
Code signing ensures artifacts have not been tampered with.
- ✗
Store credentials in plaintext within pipeline configuration files.
Why it's wrong here
Plaintext credentials are a security risk.
- ✗
Use immutable tags for container images.
Why it's wrong here
Immutable tags are good for traceability but not essential for security.
- ✓
Scan container images for vulnerabilities before deployment.
Why this is correct
Vulnerability scanning prevents known weaknesses from reaching production.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.