The following program part is given: IF (condition A) or (condition B) then DO C END IF. How many test cases are necessary in order to achieve 100% decision coverage?

The correct answer is A. 4. See the full explanation below for the reasoning.

Question

The following program part is given:

IF (condition A) or (condition B) then DO C END IF. How many test cases are necessary in order to achieve 100% decision coverage?

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