CAS-004 Security Architecture Practice Question
A financial institution is implementing a secure software development lifecycle (SSDLC) for a new web application that will handle sensitive transactions. The security architect must ensure that application security testing is integrated into the development process. Which THREE testing techniques should be used to identify vulnerabilities early and throughout the lifecycle? (Choose THREE.)
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
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Static Application Security Testing (SAST)
SAST (Static Application Security Testing) identifies vulnerabilities in source code early, DAST (Dynamic Application Security Testing) tests running applications for runtime vulnerabilities, and IAST (Interactive Application Security Testing) combines aspects of both for real-time analysis. RASP is a runtime protection tool, not a testing technique. Threat modeling is a design-phase activity, not a testing technique.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Static Application Security Testing (SAST)
Why this is correct
SAST scans source code for vulnerabilities early in development, enabling low-cost remediation.
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Runtime Application Self-Protection (RASP)
Why it's wrong here
RASP is a runtime defense technology, not a testing technique.
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Interactive Application Security Testing (IAST)
Why this is correct
IAST instruments the application to detect vulnerabilities in real time during automated testing.
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Dynamic Application Security Testing (DAST)
Why this is correct
DAST tests the running application for vulnerabilities that appear only during execution.
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Threat modeling
Why it's wrong here
Threat modeling is a design-time analysis, not a testing technique that identifies vulnerabilities in code or runtime.
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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.