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Question 1

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Which of the following BEST defines software quality?

The absence of any defects in the software

The degree to which the product meets stated and implied user needs and conforms to specifications

Software that uses the latest technology stack

Software with the most lines of code

to track

2026 Statistics

Key Facts: QAI CSTE Exam

120

Exam Questions

QAI Global (multiple-choice + essay)

70%

Passing Score

QAI Global

240 min

Exam Duration

QAI Global

$350

Exam Fee

QAI Global

3 years

Validity

Renewable via CEUs

Online

Proctoring

Online proctored

The QAI CSTE exam covers 120 questions in approximately 240 minutes (multiple-choice plus short essay) with a 70% passing score. Domains include quality principles, SDLC and V-model, configuration management, test planning and design, defect management, metrics (DRE, defect density), test process improvement (CMMI, TMMi), reviews and inspections, test types and automation strategy, plus performance and security fundamentals. Online proctored. Exam fee is $350. Certification renews every 3 years via CEUs.

Sample QAI CSTE Practice Questions

Try these sample questions to test your QAI CSTE exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which of the following BEST defines software quality?

A.The absence of any defects in the software

B.The degree to which the product meets stated and implied user needs and conforms to specifications

C.Software that uses the latest technology stack

D.Software with the most lines of code

Explanation: Quality is defined as the degree to which the product satisfies stated and implied user needs (fitness for use) and conforms to specifications (conformance to requirements) — the dual definitions of Crosby and Juran. Absence of defects is impossible (you cannot prove a negative). Technology stack and code size are not quality attributes.

2In the V-model of software development, which test level corresponds to the requirements analysis phase?

A.Component testing

B.Integration testing

C.System testing

D.Acceptance testing

Explanation: In the V-model, each development activity has a corresponding test level. Requirements analysis maps to acceptance testing, system design to system testing, architectural design to integration testing, and detailed design/coding to unit (component) testing. The V-model emphasizes early test planning and verification at each stage.

3Which IEEE standard provides the template for software test plans?

A.IEEE 829

B.IEEE 802.11

C.IEEE 754

D.IEEE 1394

Explanation: IEEE 829 (Standard for Software and System Test Documentation) defines templates for test plans, test designs, test cases, test procedures, test logs, and test reports. It has been incorporated into the broader ISO/IEC/IEEE 29119 series. IEEE 802.11 is Wi-Fi, 754 is floating-point, 1394 is FireWire.

4Which of the following is a BLACK-BOX test design technique?

A.Statement coverage

B.Branch coverage

C.Equivalence partitioning

D.Code path analysis

Explanation: Equivalence partitioning is a black-box (specification-based) technique that divides inputs into classes expected to behave the same. Statement, branch, and path coverage are white-box (structural) techniques that require source code visibility.

5Defect Removal Efficiency (DRE) measures:

A.The number of defects found per line of code

B.The percentage of defects found by a test phase relative to all defects (including those found later)

C.The number of testers per project

D.The cost of defect prevention

Explanation: DRE = (defects found in phase) / (defects found in phase + defects found later). It measures how effective a test phase or activity is at catching defects. A higher DRE indicates better defect containment within that phase. It is a leading indicator of process quality.

6Which test process improvement model is specifically designed for testing maturity?

A.CMMI

B.TMMi

C.Six Sigma

D.ITIL

Explanation: TMMi (Test Maturity Model integration) is specifically designed for assessing and improving test process maturity, with five levels (Initial, Managed, Defined, Measured, Optimization). CMMI is broader software-engineering capability; Six Sigma focuses on process variation; ITIL covers IT service management.

7Which review type is the MOST formal, with defined entry criteria, roles, and metrics?

A.Walkthrough

B.Informal review

C.Fagan inspection

D.Pair programming

Explanation: Fagan inspection (developed at IBM) is the most formal peer-review technique, with defined roles (moderator, reader, recorder, author, inspectors), entry/exit criteria, checklists, and rate metrics. Walkthroughs are author-led and less formal. Informal reviews have no defined process.

8In McCall's quality model, which factor relates to how easily a system can be modified?

A.Reliability

B.Maintainability

C.Usability

D.Efficiency

Explanation: McCall's quality model groups factors into product operation, product revision, and product transition. Maintainability (under product revision) reflects how easily a system can be modified to correct faults, improve performance, or adapt to a changed environment. ISO/IEC 25010 evolved this view.

9Which testing activity confirms that a previously fixed defect has not reappeared after a code change?

A.Smoke testing

B.Sanity testing

C.Regression testing

D.Retesting (confirmation testing)

Explanation: Regression testing reruns previously executed tests after a change to confirm that no previously working functionality (including previously fixed defects) has regressed. Retesting (confirmation testing) verifies that a specific defect fix works. Smoke and sanity tests are subsets that verify build stability.

10Which Six Sigma methodology phase identifies the root cause of process variation?

A.Define

B.Measure

C.Analyze

D.Control

Explanation: DMAIC stands for Define, Measure, Analyze, Improve, Control. The Analyze phase identifies root causes of variation using tools such as fishbone diagrams, Pareto analysis, and statistical analysis. Six Sigma applies to test process improvement and defect reduction in QAI's quality framework.

About the QAI CSTE Exam

The QAI Global Certified Software Tester (CSTE) is a mid-career credential that validates broad software testing competence. The exam combines multiple-choice and short-answer/essay questions across the QAI Common Body of Knowledge (CBOK): quality principles, the V-model and SDLCs, configuration management, project management, test planning (IEEE 829 / ISO 29119), test design (white-box, black-box, experience-based), test estimation, defect management, metrics, test process improvement (CMMI, TMMi, Six Sigma), reviews and inspections, test types, automation strategy, performance and security fundamentals, ethics, and standards.

Questions

120 scored questions

Time Limit

240 minutes

Passing Score

70%

Exam Fee

$350 (QAI Global Institute / Pearson VUE)

QAI CSTE Exam Content Outline

~15%

Quality Principles & SDLC

Quality definitions (Crosby, Juran), CIA triad, McCall and ISO 25010 quality models, Waterfall, V-model, Spiral, Iterative, Agile/Scrum, verification vs validation, testing principles

~15%

Test Planning & Management

Test plans (IEEE 829), risk-based testing, test estimation (Function Points, Wideband Delphi), entry/exit criteria, traceability, test summary reports, test environments

~15%

Test Design Techniques

Black-box (equivalence partitioning, boundary value analysis, decision tables, state transition, use case, pair-wise), white-box (statement, branch, MC/DC), experience-based

~15%

Defect Management & Metrics

Defect lifecycle, severity vs priority, root-cause analysis (5-Whys, fishbone), DRE, defect density, defect aging, automation ROI

~10%

Reviews & Configuration Management

Walkthroughs, Fagan inspections, technical reviews, audits, baselines, change control, CCB

~10%

Test Process Improvement

CMMI, TMMi, TPI Next, Six Sigma DMAIC, Kaizen / PDCA, process performance baselines

~10%

Test Types & Automation

Smoke, sanity, regression, alpha, beta, UAT, performance, security; automation strategy, Page Object Model, TDD, BDD, ATDD

~10%

Standards & Ethics

ISO 9000, ISO 12207, ISO 25010, ISO/IEC/IEEE 29119, IEEE 1012, professional ethics for testers

How to Pass the QAI CSTE Exam

What You Need to Know

Passing score: 70%
Exam length: 120 questions
Time limit: 240 minutes
Exam fee: $350

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

QAI CSTE Study Tips from Top Performers

1Buy the official CSTE CBOK from qaiglobalinstitute.com — it is the authoritative source for exam content

2The exam has both multiple-choice and short essay questions — practice concise written answers, not just MCQs

3Memorize the McCall and ISO 25010 quality factors and how they relate to test types

4Know the CMMI levels (1-5) and TMMi levels (1-5) including key process areas at each level

5Understand the Defect Removal Efficiency formula and how it differs from Defect Containment Effectiveness

6Study IEEE 829 / ISO 29119 templates for test plans, test cases, test logs, and test summary reports

7Review ethics — CSTE includes questions on professional conduct and integrity in reporting

Frequently Asked Questions

What is the QAI CSTE exam?

The Certified Software Tester (CSTE) is a mid-career credential from the QAI Global Institute that validates broad software testing competence. The exam combines multiple-choice and short-answer/essay questions covering the QAI Common Body of Knowledge — quality principles, the V-model, configuration management, test planning, design, defect management, metrics, test process improvement, reviews, automation, and standards.

How many questions are on the CSTE exam?

The CSTE exam typically includes around 100 multiple-choice questions plus around 12 short-answer/essay questions, taken in approximately 240 minutes (split across two parts). The passing score is 70% as the average of both parts. Confirm exact counts on the QAI Global Institute website at the time you register.

Are there prerequisites for the CSTE exam?

Yes. CSTE candidates typically need an associate degree plus 2 years of software testing experience, a bachelor's degree plus 1 year, or 6 years of testing experience without a degree. QAI also offers the entry-level CAST (Certified Associate in Software Testing) for those without enough experience to qualify for CSTE.

What topics are on the CSTE exam?

The CSTE Common Body of Knowledge covers: quality principles, V-model and SDLCs, configuration management, project management, test planning and design (white-box, black-box, experience-based), test estimation, defect management lifecycle, metrics (DRE, defect density, ROI), test process improvement (CMMI, TMMi, Six Sigma DMAIC), McCall and ISO quality models, reviews and inspections (Fagan), test types (smoke, sanity, regression, alpha, beta, UAT), automation strategy, performance and security fundamentals, ethics, and IEEE/ISO standards.

How should I prepare for the CSTE exam?

Plan 60-100 hours of study over 8-12 weeks. Buy the official CSTE CBOK from QAI Global Institute. Optionally take a QAI CSTE Preparatory Course (live virtual). Review IEEE 829, ISO/IEC 25010, and ISO/IEC/IEEE 29119. Practice writing concise short-answer responses (the essay portion is heavily weighted). Complete 100+ practice questions and target 80%+ before scheduling.

Does the CSTE certification expire?

Yes. The CSTE certification is valid for 3 years and is renewable through Continuing Professional Education (CPE) units. QAI requires 60 CPE units over the 3-year cycle, earned through training, conferences, teaching, publishing, or related activities.