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Question 124 - CTFL4 discussion

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For the following pseudo-code determine number of tests required for 100% statement coverage

IF Gender = Boy

If Age > 3 AND Age < 5

Shoe Size = 1

ELSE IF Age >=5 AND Age < 7

Shoe Size = 2

ENDIF

ELSE

IF Age > 3 AND Age < 5

Shoe Size = 0

ELSE IF Age >=5 AND Age < 7

Shoe Size = 1

ENDIF

ENDIF

A.
6
Answers
A.
6
B.
4
Answers
B.
4
C.
2
Answers
C.
2
D.
6
Answers
D.
6
Suggested answer: B

Explanation:

To achieve 100% statement coverage, we need to design test cases that ensure every statement in the given pseudo-code is executed at least once. Analyzing the pseudo-code, we notice that there are conditions based on two variables: Gender and Age. To cover all statements, we need to consider the paths that lead to each assignment of the Shoe Size variable.

Gender = Boy, Age <= 3 (Shoe Size assignment is not reached, but the condition is evaluated)

Gender = Boy, Age > 3 AND Age < 5 (Shoe Size = 1)

Gender = Boy, Age >= 5 AND Age < 7 (Shoe Size = 2)

Gender != Boy, Age <= 3 (Again, Shoe Size assignment is not reached, but the condition is evaluated)

Gender != Boy, Age > 3 AND Age < 5 (Shoe Size = 0)

Gender != Boy, Age >= 5 AND Age < 7 (Shoe Size = 1)

However, upon closer inspection, we see that tests 1 and 4 do not contribute to statement coverage as they do not lead to a Shoe Size assignment. Therefore, we only need 4 test cases to achieve 100% statement coverage, making option B the correct answer.

asked 18/09/2024
Mario Alba Barrero
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