A Software Engineering question, regarding Black-Box Testing Techniques: Q:- A p

Question

A Software Engineering question, regarding Black-Box Testing Techniques:

Q:- A program computes its output variable T according to the following formula: [ x as in multiply]

1)T = X x 0.2 + Y x 0.4 + Z x 0.4 where X>= 50, Y>= 50 and Z >= 50

2)T= X x 0.2 + Y x 0.3 + Z x 0.5 where X,Y and Z are otherwise than X>= 50, Y>= 50 and Z >= 50 range.

The input variables of this program are X,Y and Z. All of them are positive values. Using the following Black-Box testing techniques to design a test that is suit to this program:

c) Cause-effect Testing

Explanation / Answer

Cause :

c1 : X is less than 50 and Y and Z are greater than 50

c2: Y is less than 50 and X and Z are greater than 50

c3: z is less than 50 and Y and X are greater than 50

c4:X and Y are less than 50 and Z is greater than 50

c5: X and Z are less than 50 and Y is greater than 50

c6 Y and Z are less than 50 and X is greater than 50

Effect :

e1: Calculation would be wrong

e2: Calculation would be wrong

e3: Calculation would be wrong

e4: Calculation would be wrong

e5: Calculation would be wrong

e6: Calculation would be wrong

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