The answer is running static application security testing (SAST) on every code commit. SAST scans source code for vulnerabilities like SQL injection or buffer overflows before the code is compiled, making it a perfect fit for a DevSecOps SAST CI pipeline because it provides immediate feedback to developers without slowing down the build. On the CompTIA SecurityX CAS-004 exam, this question tests your understanding of shift-left security—the principle of moving security checks as early as possible in the software development lifecycle. A common trap is confusing SAST with dynamic testing or post-deployment scans; remember that SAST happens on the source code during integration, not on a running application. The key memory tip is “SAST scans the source, DAST tests the course”—SAST runs in the CI pipeline, while DAST and penetration testing occur later.
CAS-004 Practice Question: Application Environment, Configuration and Security
This CAS-004 practice question tests your understanding of application environment, configuration 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 software development team is adopting a DevSecOps approach. Which of the following practices best integrates security into the continuous integration pipeline?
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
✓
Running static application security testing (SAST) on every code commit
Option A is correct because SAST runs on every code commit in CI, catching vulnerabilities early. Option B (penetration testing) is after release, too late. Option C (vulnerability scanning on production) is after deployment. Option D (annual training) is not integrated into the pipeline.
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.
✓
Running static application security testing (SAST) on every code commit
Why this is correct
SAST automates security checks early in development, aligning with DevSecOps automation.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Conducting annual security training for developers
Why it's wrong here
Training is important but is not an automated integration into the CI pipeline.
✗
Using a vulnerability scanner on production servers
Why it's wrong here
Scanning production is after deployment and may detect vulnerabilities too late.
✗
Performing penetration testing after each release
Why it's wrong here
Penetration testing is periodic and manual, not integrated into the CI pipeline.
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 practitioner preparing for the CAS-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which CAS-004 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.
Application Environment, Configuration and Security — This question tests Application Environment, Configuration and Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Running static application security testing (SAST) on every code commit — Option A is correct because SAST runs on every code commit in CI, catching vulnerabilities early. Option B (penetration testing) is after release, too late. Option C (vulnerability scanning on production) is after deployment. Option D (annual training) is not integrated into the pipeline.
What should I do if I get this CAS-004 question wrong?
Identify which CAS-004 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.
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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