ITPEC IP April 2018 Question 46
ITPEC IP April 2018 — Question 46 of 100
Testing must verify intended behavior for both normal inputs and erroneous or exceptional inputs. Invalid data, boundary values, missing information, and unexpected sequences should be handled safely according to requirements rather than causing incorrect results or failure.
Answer (d)
Why not others:
- black-box testing checks external behavior, while white-box testing examines internal structure, so option (a) reverses them
- finding many errors can indicate areas where more errors remain
- testing demonstrates defects and confidence but cannot prove that a nontrivial program is completely error-free
Key rule: Effective tests cover normal, boundary, abnormal, and error-handling cases; exhaustive proof through testing is generally impossible.
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