CSSLP Secure Software Testing Practice Question
Which testing methodology provides the best visibility into the internal logic of an application while it is running?
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
✓
IAST.
IAST (Interactive Application Security Testing) combines the benefits of SAST (visibility into code) and DAST (runtime analysis).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Penetration testing.
Why it's wrong here
Penetration testing is an activity, not a specific tool-based methodology.
- ✗
DAST.
Why it's wrong here
DAST is black-box and lacks internal visibility.
- ✗
SAST.
Why it's wrong here
SAST does not run the code.
- ✗
null
Why it's wrong here
null
- ✓
IAST.
Why this is correct
IAST instruments the runtime application, providing deep visibility.
About these practice questions
One of 198 original CSSLP practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This CSSLP practice question is part of Courseiva's free (ISC)² 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 CSSLP exam.