Free ISTQB ISTQB-CTFL Exam Actual Questions

The questions for ISTQB-CTFL were last updated On Apr 27, 2025

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Question No. 1

Why it is essential that defects found in a review be reported objectively?

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Correct Answer: B

The purpose of a review is to find defects and improve the quality of the work product, not to criticize or blame the author. Reporting defects objectively means describing them factually and constructively, without using negative or emotional language that could offend the author or damage their motivation. This way, the author can take the feedback positively as an effort at improving the product and not as a personal assault. Verified Reference: A Study Guide to the ISTQB Foundation Level 2018 Syllabus - Springer, page 138.


Question No. 2

Which of the following is a typical potential risk of using test automation tools?

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Correct Answer: D

One of the common risks associated with test automation tools is the underestimation of the effort required to maintain test scripts. Test scripts can become outdated or broken due to changes in the application, requiring significant effort to update and maintain them. This risk is highlighted in the ISTQB CTFL syllabus under the discussion of the benefits and risks of test automation.


Question No. 3

A system has valid input numbers ranging between 1000 and 99999 (both inclusive). Which of the following inputs are a result of designing tests for all valid equivalence classes and their boundaries?

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Correct Answer: B

A correct list of boundary values for the P input should include the minimum and maximum values of the valid range (15 and 350), as well as the values just below and above the boundaries (14 and 351). Boundary value analysis is a test design technique that involves testing the values at or near the boundaries of an input domain or output range, as these values are more likely to cause errors than values in the middle. Option B satisfies this condition, as it has all four boundary values (14, 15, 350, 351). Option A has two values from the same equivalence class (1000 and 99999), option C has two values outside the range (999 and 100000), and option D has no boundary values at all. Verified Reference: A Study Guide to the ISTQB Foundation Level 2018 Syllabus - Springer, page 34.


Question No. 4

A software system checks age in order to determine which welcome screen to display. Age groups are:

Group I: 0-12

Group II; 13-18

Group III: over 18

Which of the below represent boundary values?

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Correct Answer: A

A correct list of boundary values for the age input should include the minimum and maximum values of each age group (0, 12, 13, 18), as well as the values just below and above each boundary (-1, 19). Boundary value analysis is a test design technique that involves testing the values at or near the boundaries of an input domain or output range, as these values are more likely to cause errors than values in the middle. Option A satisfies this condition, as it has all six boundary values (-1, 0, 12, 13, 18, 19). Option B has two values from the same equivalence class (12 and 13), option C has only four boundary values (0, 12, 18, 19), and option D has no boundary values at all. Verified Reference: A Study Guide to the ISTQB Foundation Level 2018 Syllabus - Springer, page 34.


Question No. 5

A software calculates the annual car tax using three inputs:

- E; the emission level of the vehicle

- P: the power of the vehicle

-T the type of the vehicle

The input value for P can be integer positive values between 15 and 350.

Which of the following answers contains a correct list of a boundary values for the P input?

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Correct Answer: B

A correct list of boundary values for the P input should include the minimum and maximum values of the valid range (15 and 350), as well as the values just below and above the boundaries (14 and 351). Boundary value analysis is a test design technique that involves testing the values at or near the boundaries of an input domain or output range, as these values are more likely to cause errors than values in the middle. Option B satisfies this condition, as it has all four boundary values (14, 15, 350, 351). Option A has only two boundary values (14 and 351), option C has only two boundary values (15 and 350), and option D has no boundary values at all. Verified Reference: A Study Guide to the ISTQB Foundation Level 2018 Syllabus - Springer, page 34.