Istqb Certified Tester Foundation Level CTFL · Free Practice Question Easy
Question 70
Why is it important to take the “tests wear out” principle into account while performing testing?
-
A
Running the same tests repeatedly increases the likelihood of finding defects.
-
B
Running the same tests over and over reduces the chance of finding new defects.
-
C
Tests should not be context dependent.
-
D
Dynamic tests wear out quicker than static tests.
Reveal correct answer
Correct answer: B
Explanation
As per syllabus:
1.3 Testing Principles
A number of testing principles offering general guidelines applicable to all testing have been suggested over the years. This syllabus describes seven such principles.
5. Tests wear out. If the same tests are repeated many times, they become increasingly ineffective in detecting new defects. To overcome this effect, existing tests and test data may need to be modified, and new tests may need to be written. However, in some cases, repeating the same tests can have a beneficial outcome, e.g., in automated regression testing.
A.
Running the same tests repeatedly doesn't increase the likelihood of finding defects. In reality, running the same tests repeatedly decreases the likelihood of finding defects.
B. The "tests wear out" principle emphasizes that running the same tests over and over reduces the chance of finding new defects. This is because as tests are repeatedly executed, they become less effective at uncovering additional defects, leading to diminishing returns in the testing process.
C.
Tests should be context dependent, so this sentence is not correct. Also, this choice does not address the concept of the "tests wear out" principle.
D.
The statement that dynamic tests wear out quicker than static tests is meaningless.
Discussion
Think the marked answer is wrong, or have a better explanation? Share it below — comments appear after review.
