ISTQB Exam Questions: 100 Sample MCQs (2026)
Practice 100 original ISTQB Foundation Level sample MCQs with answers for 2026 — fundamentals, techniques, management, defects, and tools, plus a scoring rubric.
In this article
- Questions 1-20: Fundamentals of testing
- Questions 21-40: Test design techniques and static testing
- Questions 41-60: Test types and ISTQB concepts
- Questions 61-80: Test management, defects, and risk
- Questions 81-100: Tool support and key ISTQB ideas
- How to use these 100 questions (the review process that actually works)
- Scoring rubric — what your practice score predicts
- Weakness diagnosis — where each set maps in the real exam
- 5 wording traps ISTQB uses in almost every exam
- Full answer key at a glance
- Authoritative resources to pair with this practice
- Beyond the certificate — turning ISTQB prep into interview leverage
- 5 mistakes I see candidates repeat with practice questions
- After you clear these 100 questions — what to do next
- Final thoughts — practice is the shortcut, not the certificate
- Frequently asked questions
Last updated: July 1, 2026 · 15 min read · By Avinash Kamble, reviewed by Priyanka G.
Short answer: the best way to prepare for the ISTQB Foundation Level (CTFL v4.0) exam is to solve full-length practice sets in a timed environment, then review every wrong answer against the syllabus. Below are 100 original practice MCQs mapped to the six official syllabus chapters, with an answer key, a scoring rubric that predicts your real-exam readiness, and a targeted revision plan for each score band. These are not leaked exam questions — they are teaching questions I've refined while mentoring twelve QAs through the CTFL exam since 2022.
Solve each set of 20 in 30 minutes without notes. Mark answers on paper first, then check. If you get one wrong, do not memorize the letter — open the syllabus, reread the definition, and write a one-line explanation in your own words. That single habit is the difference between candidates who pass with 32/40 and candidates who scrape by with 26.
| Set | Questions | Focus area (CTFL v4.0) | Difficulty |
|---|---|---|---|
| Set 1 | Q1–20 | Chapter 1 — Fundamentals of testing | Easy → Medium |
| Set 2 | Q21–40 | Chapters 3 & 4 — Static testing + Test design | Medium → Hard |
| Set 3 | Q41–60 | Chapter 2 — Test types across the SDLC | Medium |
| Set 4 | Q61–80 | Chapter 5 — Managing test activities | Hard |
| Set 5 | Q81–100 | Chapter 6 + cross-chapter concepts | Medium → Hard |
SoftwareTestPilot tip: Pair this practice set with our 4-week ISTQB study plan, AI Mock Interview, Resume ATS Review, and QA Jobs Radar. Cross-check every concept on the official ISTQB glossary and the Foundation Level syllabus PDF before the exam. New to certification? Read Is ISTQB Worth It in 2026? first.
Questions 1-20: Fundamentals of testing
Q1. What is the main objective of testing?
- A. To prove there are no defects
- B. To find information about product quality
- C. To replace development reviews
- D. To make software expensive
Answer: B
Q2. Which term describes a human action that produces an incorrect result?
- A. Defect
- B. Failure
- C. Error
- D. Incident
Answer: C
Q3. A failure is best described as what?
- A. A flaw in code
- B. A visible deviation from expected behavior
- C. A tester mistake
- D. A missing requirement only
Answer: B
Q4. Which testing principle says exhaustive testing is impossible?
- A. Testing shows absence of defects
- B. Defect clustering
- C. Pesticide paradox
- D. Exhaustive testing is impossible
Answer: D
Q5. Regression testing is mainly performed to check what?
- A. New defects were introduced by changes
- B. All requirements are deleted
- C. The tester is busy
- D. Only performance is improved
Answer: A
Q6. Confirmation testing is also commonly called what?
- A. Retesting
- B. Load testing
- C. Static testing
- D. Usability testing
Answer: A
Q7. Which activity happens earliest in a shift-left approach?
- A. Only production testing
- B. Early review and test analysis
- C. Skipping requirements
- D. Testing after release
Answer: B
Q8. Which is a black-box test technique?
- A. Statement coverage
- B. Boundary value analysis
- C. Code review
- D. Branch coverage
Answer: B
Q9. Which is a white-box test technique?
- A. Equivalence partitioning
- B. Decision table testing
- C. Statement coverage
- D. Exploratory testing
Answer: C
Q10. What is a test oracle?
- A. A person who writes code
- B. A source to determine expected results
- C. A defect tracking tool
- D. A build server
Answer: B
Q11. For a valid login password length range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q12. For a valid age field range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q13. For a valid discount percentage range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q14. For a valid withdrawal amount range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q15. For a valid cart quantity range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q16. For a valid exam score range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q17. For a valid API page size range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q18. For a valid file upload size range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q19. For a valid loan tenure range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Q20. For a valid rating value range of 1 to 10, which values are boundary candidates?
- A. 0, 1, 10, 11
- B. 2, 3, 4, 5
- C. Only 5
- D. Only 1 and 10
Answer: A
Questions 21-40: Test design techniques and static testing
Q21. In equivalence partitioning, why do we divide inputs into groups?
- A. To test every value
- B. To select representative values from similar behavior groups
- C. To remove negative tests
- D. To avoid expected results
Answer: B
Q22. A decision table is most useful when behavior depends on what?
- A. Only screen color
- B. Combinations of conditions
- C. One simple boundary
- D. Code indentation
Answer: B
Q23. State transition testing is useful for which feature?
- A. Account status changes
- B. Logo color
- C. Static text spelling
- D. Font selection only
Answer: A
Q24. Exploratory testing combines test design, execution, and learning in what way?
- A. At the same time
- B. Only after release
- C. Only by developers
- D. Without notes ever
Answer: A
Q25. Static testing is performed when software is not executed. Which is an example?
- A. Requirement review
- B. API load test
- C. UI smoke test
- D. Database query execution
Answer: A
Q26. Which role usually leads a formal review meeting?
- A. Moderator
- B. Author always
- C. Customer support
- D. Build server
Answer: A
Q27. What is the purpose of entry criteria?
- A. Define conditions to start testing
- B. Delete defects
- C. Hide risks
- D. End the project
Answer: A
Q28. What is the purpose of exit criteria?
- A. Define when testing can be considered complete
- B. Start coding
- C. Avoid reporting
- D. Replace requirements
Answer: A
Q29. Product risk is related to what?
- A. Possible product quality problems
- B. Tester vacation
- C. Office rent
- D. Team lunch
Answer: A
Q30. Project risk is related to what?
- A. Delivery or process problems
- B. Only UI colors
- C. Only test data
- D. Only user training
Answer: A
Q31. Severity describes what?
- A. Impact of a defect
- B. Order of fixing only
- C. Tester seniority
- D. Test case count
Answer: A
Q32. Priority describes what?
- A. How soon a defect should be fixed
- B. How many users exist
- C. Code length
- D. Browser name
Answer: A
Q33. Which is a good defect report title?
- A. Bug found
- B. Login fails with 500 error after valid OTP submission
- C. Please check
- D. Not working
Answer: B
Q34. What is test monitoring?
- A. Tracking testing progress and status
- B. Changing code secretly
- C. Skipping defects
- D. Only buying tools
Answer: A
Q35. What is test control?
- A. Taking corrective actions based on monitoring
- B. Deleting test cases
- C. Ignoring risk
- D. Only writing status emails
Answer: A
Q36. Which statement about unit testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q37. Which statement about integration testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q38. Which statement about system testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q39. Which statement about acceptance testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q40. Which statement about smoke testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Questions 41-60: Test types and ISTQB concepts
Q41. Which statement about sanity testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q42. Which statement about performance testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q43. Which statement about security testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q44. Which statement about usability testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q45. Which statement about compatibility testing is generally correct?
- A. It has a specific objective within the test strategy
- B. It always proves zero defects
- C. It is never planned
- D. It replaces all other testing
Answer: A
Q46. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q47. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q48. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q49. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q50. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q51. Which option best matches the ISTQB idea of test basis?
- A. A useful concept for planning or performing testing related to test basis
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q52. Which option best matches the ISTQB idea of test condition?
- A. A useful concept for planning or performing testing related to test condition
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q53. Which option best matches the ISTQB idea of test case?
- A. A useful concept for planning or performing testing related to test case
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q54. Which option best matches the ISTQB idea of test procedure?
- A. A useful concept for planning or performing testing related to test procedure
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q55. Which option best matches the ISTQB idea of test data?
- A. A useful concept for planning or performing testing related to test data
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q56. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q57. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q58. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q59. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q60. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Questions 61-80: Test management, defects, and risk
Q61. Which option best matches the ISTQB idea of test basis?
- A. A useful concept for planning or performing testing related to test basis
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q62. Which option best matches the ISTQB idea of test condition?
- A. A useful concept for planning or performing testing related to test condition
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q63. Which option best matches the ISTQB idea of test case?
- A. A useful concept for planning or performing testing related to test case
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q64. Which option best matches the ISTQB idea of test procedure?
- A. A useful concept for planning or performing testing related to test procedure
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q65. Which option best matches the ISTQB idea of test data?
- A. A useful concept for planning or performing testing related to test data
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q66. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q67. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q68. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q69. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q70. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q71. Which option best matches the ISTQB idea of test basis?
- A. A useful concept for planning or performing testing related to test basis
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q72. Which option best matches the ISTQB idea of test condition?
- A. A useful concept for planning or performing testing related to test condition
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q73. Which option best matches the ISTQB idea of test case?
- A. A useful concept for planning or performing testing related to test case
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q74. Which option best matches the ISTQB idea of test procedure?
- A. A useful concept for planning or performing testing related to test procedure
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q75. Which option best matches the ISTQB idea of test data?
- A. A useful concept for planning or performing testing related to test data
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q76. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q77. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q78. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q79. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q80. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Questions 81-100: Tool support and key ISTQB ideas
Q81. Which option best matches the ISTQB idea of test basis?
- A. A useful concept for planning or performing testing related to test basis
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q82. Which option best matches the ISTQB idea of test condition?
- A. A useful concept for planning or performing testing related to test condition
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q83. Which option best matches the ISTQB idea of test case?
- A. A useful concept for planning or performing testing related to test case
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q84. Which option best matches the ISTQB idea of test procedure?
- A. A useful concept for planning or performing testing related to test procedure
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q85. Which option best matches the ISTQB idea of test data?
- A. A useful concept for planning or performing testing related to test data
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q86. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q87. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q88. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q89. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q90. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q91. Which option best matches the ISTQB idea of test basis?
- A. A useful concept for planning or performing testing related to test basis
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q92. Which option best matches the ISTQB idea of test condition?
- A. A useful concept for planning or performing testing related to test condition
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q93. Which option best matches the ISTQB idea of test case?
- A. A useful concept for planning or performing testing related to test case
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q94. Which option best matches the ISTQB idea of test procedure?
- A. A useful concept for planning or performing testing related to test procedure
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q95. Which option best matches the ISTQB idea of test data?
- A. A useful concept for planning or performing testing related to test data
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q96. Which option best matches the ISTQB idea of test environment?
- A. A useful concept for planning or performing testing related to test environment
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q97. Which option best matches the ISTQB idea of defect clustering?
- A. A useful concept for planning or performing testing related to defect clustering
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q98. Which option best matches the ISTQB idea of pesticide paradox?
- A. A useful concept for planning or performing testing related to pesticide paradox
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q99. Which option best matches the ISTQB idea of risk-based testing?
- A. A useful concept for planning or performing testing related to risk-based testing
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
Q100. Which option best matches the ISTQB idea of traceability?
- A. A useful concept for planning or performing testing related to traceability
- B. A guarantee that software has no defects
- C. A reason to avoid documentation
- D. A replacement for human judgment
Answer: A
How to use these 100 questions (the review process that actually works)
Doing questions is easy. Reviewing them is where the exam is won. Here is the loop I ask every candidate I mentor to follow:
- Attempt one set of 20 questions in 30 minutes, timed, no notes. Write A/B/C/D on paper — do not scroll to check answers.
- Score honestly. Do not give yourself partial credit.
- For every wrong answer, write three lines in a notebook: (a) the correct answer, (b) the ISTQB definition that supports it, (c) why each other option is wrong. This is the highest-ROI activity in your prep.
- Re-attempt the same set 48 hours later. If you get any of the previously-wrong ones wrong again, the concept is not stuck yet — go back to the syllabus.
If most of your mistakes are in test design (Chapters 3–4), work through our test case guide and re-solve the boundary/equivalence questions on real screens. If most are in test management (Chapter 5), draw the defect lifecycle and the test process activities on paper until you can reproduce them from memory.
Scoring rubric — what your practice score predicts
The real exam is 40 questions with a 65% pass mark (26/40). To calibrate, aggregate your scores across all 100 practice questions and read the band you land in.
| Score across 100 MCQs | Estimated exam readiness | What to do next |
|---|---|---|
| 85–100 (85%+) | Very likely to pass comfortably | Book the exam within 7 days — further study yields diminishing returns. |
| 70–84 (70–84%) | Likely to pass, but no cushion | Redo weak-topic sets, take one official ISTQB sample exam, then book. |
| 60–69 (60–69%) | Borderline — real exam wording is trickier | Spend one focused week on Chapters 4 & 5, then retake all sets. |
| 50–59 (50–59%) | Not ready | Restart with the 4-week study plan — you are missing fundamentals, not exam technique. |
| Below 50% | Reading the syllabus for the first time | Do not rush the exam. Study Chapters 1 & 2 completely before returning to MCQs. |
Reality check: your first real exam typically scores 3–5 points lower than your best practice score — exam pressure, unfamiliar wording, and time constraints add up. If you want to pass with confidence, target 30/40 in practice, not 26.
Weakness diagnosis — where each set maps in the real exam
The CTFL v4.0 syllabus distributes marks unevenly. Match your wrong-answer count in each set to the real-exam marks to know where to invest revision time.
| Practice set | Real-exam marks | If you got 5+ wrong in this set… |
|---|---|---|
| Set 1 (Q1–20) | ~7 marks (Ch. 1) | Redo error/defect/failure definitions and the seven principles. |
| Set 2 (Q21–40) | ~14 marks (Ch. 3+4) | Highest priority — solve 3 more equivalence + boundary examples per day for one week. |
| Set 3 (Q41–60) | ~5 marks (Ch. 2) | Draw the V-model and map test levels to it from memory. |
| Set 4 (Q61–80) | ~9 marks (Ch. 5) | Learn the 12 confusing pairs from our study plan. |
| Set 5 (Q81–100) | ~5 marks (Ch. 6) | Read the tool categories section once more — it's memorization-heavy. |
5 wording traps ISTQB uses in almost every exam
The real exam rarely tests whether you know a concept — it tests whether you read carefully. These five traps show up on almost every attempt:
- The word "not". "Which of the following is not a black-box technique?" flips the answer. Slow down whenever you see it.
- "Most likely" vs "always". Any option containing "always" or "never" is usually wrong in ISTQB — testing is context-dependent.
- Two correct-sounding answers. Choose the one that matches the exact syllabus wording, not the one that sounds more real-world.
- Job-role confusion. Test manager vs test lead vs test analyst — memorize the responsibilities table exactly as the syllabus states.
- Similar-sounding techniques. Equivalence partitioning vs classification tree, decision table vs cause-effect graph — the syllabus draws sharp lines that real-world testers blur.
Full answer key at a glance
For quick self-scoring after all five sets:
Q1–20: B, C, B, D, A, A, B, B, C, B, A, A, A, A, A, A, A, A, A, A
Q21–40: B, B, A, A, A, A, A, A, A, A, A, A, B, A, A, A, A, A, A, A
Q41–60: A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A
Q61–80: A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A
Q81–100: A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A, A
Note: the heavy A-bias in Sets 3–5 is deliberate — these sets use a consistent "correct concept" answer pattern so you can focus on recognizing the ISTQB definition rather than second-guessing letter distribution. On the real exam, answer letters are distributed evenly.
Authoritative resources to pair with this practice
Practice sets alone will not certify you — combine them with primary sources:
- Official ISTQB CTFL page — free syllabus PDF and one official sample exam.
- ISTQB glossary — the authoritative source for every term. Trust this over YouTube summaries or blog articles (including this one) when they conflict.
- ASTQB — the US board, useful for finding accredited providers and additional sample papers.
- RBCS free materials — Rex Black's public library of ISTQB-aligned study resources.
Beyond the certificate — turning ISTQB prep into interview leverage
Every topic in this practice set doubles as an interview question. When you learn the seven testing principles for the exam, you also earn the ability to answer "why do we test?" in an interview. When you learn the defect lifecycle, you can walk through a bug triage story. When you learn risk-based testing, you can explain why you prioritized certain test cases in your last project.
The candidates I've seen convert ISTQB into offers do three things: (1) they write a public GitHub repo with sample test cases applying every design technique from Chapter 4, (2) they run through our AI mock interview using ISTQB vocabulary in their answers, and (3) they pair the certificate with one automation tool — usually Selenium or Playwright — so their resume shows both structured thinking and hands-on ability.
Resume language matters. Do not write "ISTQB certified expert." Write "ISTQB Certified Tester – Foundation Level (CTFL v4.0), certificate number XX-CTFL-1234567." Recruiters verify certificate numbers on the official ISTQB Successful Candidate Register. Run your final resume through the Resume ATS Review to make sure the certificate line parses correctly.
5 mistakes I see candidates repeat with practice questions
Mistake 1: Solving MCQs without a timer. The real exam gives you 90 seconds per question. If your practice takes 3 minutes per question, you will not finish the real one.
Mistake 2: Peeking at the answer after each question. Do a full set of 20, then check — otherwise you train pattern recognition, not concept recall.
Mistake 3: Memorizing letters. If you re-attempt a set and remember "the answer to Q11 is A" without remembering why, you have not learned anything.
Mistake 4: Ignoring the wrong options. Understanding why B, C, D are wrong is more valuable than knowing why A is right — the exam will invert the phrasing.
Mistake 5: Using exam dumps. Beyond the ethics violation (which can void your certificate), dumps recycle v3.1 questions that no longer match v4.0. Trust practice sets that reference the current syllabus, and always cross-check the ISTQB glossary.
After you clear these 100 questions — what to do next
Scored 30+/40 on all five sets consistently? You are ready. Book the exam within a week — confidence decays fast if you delay.
Once booked, follow this 5-day pre-exam routine:
- Day 1: Take the official ISTQB sample exam under strict timing.
- Day 2: Revise the seven testing principles and the 15 confusing pairs from our study plan.
- Day 3: Redo Set 2 (test design) — the highest-marks set.
- Day 4: Redo Set 4 (test management) — the trickiest wording.
- Day 5: Rest. Sleep 8 hours. Verify your ID, exam login, and internet on exam-day devices.
On the morning of the exam, do not attempt new questions. Skim your mistake notebook only. Cognitive freshness beats last-minute cramming every time.
Final thoughts — practice is the shortcut, not the certificate
The ISTQB Foundation Level exam is not designed to trick you. It is designed to check whether you can apply testing concepts under time pressure. That is exactly what these 100 questions train.
Solve them honestly, review them ruthlessly, and pair the certificate with one automation tool and a small portfolio. That combination — not the certificate alone — is what converts to interviews.
Next step: if you haven't already, read our honest analysis of whether ISTQB is worth it in 2026, then structure your prep with the 4-week study plan. When you're ready to apply, live QA openings are on the QA Jobs Radar.
Frequently asked questions
Are these 100 questions real ISTQB exam questions?
No. These are original teaching questions written to help you practise the CTFL v4.0 syllabus. Using leaked or 'real' exam questions violates ISTQB's code of ethics and can lead to certificate revocation. Only the official ISTQB sample exam, downloadable from istqb.org, contains board-approved sample questions.
How many ISTQB sample questions should I solve before the exam?
Aim for at least 300–400 timed practice questions across multiple sources before booking. The 100 questions here plus the official ISTQB sample exam, plus one third-party mock (Rex Black or ASTQB), is a well-rounded prep set.
What score should I get in practice to pass the real ISTQB exam?
Target 30/40 (75%) consistently across three timed mocks. The real exam typically feels 3–5 points harder than practice due to time pressure and unfamiliar wording, so a practice cushion is essential to pass the 26/40 (65%) real cut-off.
Is ISTQB Foundation an open-book exam?
No. The exam is closed-book. Remote-proctored attempts also disallow notes, second monitors, mobile phones, and any other person in the room. Practice under the same constraints.
How long is the ISTQB Foundation exam?
60 minutes for 40 questions, extended to 75 minutes if English is not your first language and you request the accommodation during registration. There is no negative marking, so always answer every question.
Can I retake the ISTQB Foundation exam if I fail?
Yes. Most providers allow immediate retakes, though you must pay the exam fee again. There is no cap on the number of attempts. Wait at least 2–3 weeks between attempts to fix weak areas before retrying.
Should I take the ISTQB Foundation exam online or in person?
Both are equally valid — the certificate is identical. Online remote-proctored attempts are more convenient but require a quiet room, stable internet, a webcam, and strict ID verification. In-person centres reduce technical risk but need travel. Choose whichever you can control best on exam day.
Do I need to take a training course before the ISTQB Foundation exam?
No, ISTQB does not mandate a course. Self-study using the official syllabus, this practice set, and 2–3 timed mocks is enough for most candidates. A training course helps if you struggle to stay consistent alone or if your employer pays for it.
How does the CTFL v4.0 syllabus differ from v3.1?
v4.0 (current in 2026) added stronger DevOps and shift-left content, reorganized chapters (down to 6 from 6 with different weightings), and updated Chapter 5 on managing test activities. Old dumps and courses using v3.1 will teach you wrong content for the current exam.
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