A software application is supposed to calculate square root of all integers from 1 to 32767. The tester divides the input into valid and invalid equivalence classes.
Valid equivalence class: 1-32767, invalid: all negative numbers, all numbers > 32767, all non-integers etc. However, when square root for all numbers in the valid equivalence class was calculated, it was found that for 3 number, the results were incorrect. These number were not the boundary values. Which of the following is correct?
A. It is sometimes possible to find that some values in equivalence class do not behave in the same manner as rest of the class.
B. The tester should always try all possible.
C. It is practically impossible for values in an equivalence class to behave in different manner.
D. The tester chose equivalence classes incorrectly.
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