CTFL-v4 Testing Throughout the SDLC Practice Question
Which THREE of the following are benefits of static testing early in the SDLC?
⚠ Common exam trap
Candidates often assume static testing is only about finding bugs in code, ignoring that it also covers documentation, requirements, and design to prevent defects before any code is actually written.
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
✓
Reduced cost of quality by finding defects before they are implemented in code.
Static testing is the most powerful tool for defect prevention. By analyzing documentation before implementation, teams can identify errors that are cheap to fix. It also clarifies requirements, improves communication, and provides a head start on test planning. These benefits compound throughout the SDLC, reducing rework and ensuring the final product matches the intended design and user requirements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Reduced cost of quality by finding defects before they are implemented in code.
Why this is correct
Identifying defects in requirements or design is significantly cheaper than fixing them once they have been implemented. By catching errors during static testing, the team avoids the downstream costs associated with debugging, code rework, re-testing, and potential project delays, leading to a much more cost-effective development process.
- ✗
Elimination of the need for any dynamic testing in the later stages.
Why it's wrong here
Static testing cannot replace dynamic testing. While it prevents many defects, dynamic testing is still required to verify the actual behavior of the running code, integration with hardware or databases, and overall system performance. Both approaches are necessary to provide high confidence in the final software product.
- ✓
Early identification of missing or ambiguous requirements.
Why this is correct
Reviewing requirements early highlights gaps, contradictions, and ambiguities. This gives stakeholders and developers time to align their understanding before construction begins. Preventing these issues at the start is crucial, as requirements errors are the leading cause of project failure and significant rework in complex software development projects.
- ✓
Increased understanding of the system by testers, leading to better test design.
Why this is correct
Participating in reviews allows testers to gain deep insights into the intended system functionality. This knowledge enables the creation of more accurate and comprehensive test cases. Understanding the design early allows testers to plan edge cases and scenarios that might have been overlooked if they started testing later.
- ✗
Automated code coverage analysis of the requirement document.
Why it's wrong here
Static testing of requirements is a manual process involving reviews and analysis. Code coverage is a metric associated with dynamic testing, specifically applied to source code after it has been executed. You cannot calculate code coverage on a requirement document, as there is no executable code to measure.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official ISTQB exam blueprint
This CTFL-v4 practice question is part of Courseiva's free ISTQB 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 CTFL-v4 exam.