ITPEC FE Subject A October 2024 Question 37

Condition testing — a white box technique whose test cases come from the conditions written in the code.

White box testing uses knowledge of the program's internal structure: test cases are chosen to exercise its statements, its decisions (branches) and the individual conditions inside them. Condition testing makes each condition in a decision evaluate to both true and false, which can only be designed by reading the code. Black box testing designs cases from the specification alone.

Answer (b)

Why not others:

• •(a) Boundary value analysis — a black box technique: picks values at and just around the edges of the valid input ranges in the specification
• •(c) Equivalence partitioning — a black box technique: divides inputs into classes the specification treats alike and tests one representative of each
• •(d) Orthogonal array testing — a black box technique: chooses a balanced subset of combinations of input parameters

Key rule: Coverage criteria (statement, decision, condition, multiple-condition) are white box; techniques built from the specification (equivalence classes, boundary values, decision tables, orthogonal arrays) are black box.

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