ITPEC FE Morning April 2023 Question 49

Source exam: ITPEC FE Morning April 2023Topic: Software Development

ITPEC FE Morning April 2023 — Question 49 of 80

Decision Condition Coverage (Branch Coverage) — select test cases that cover both decision outcomes.

Condition: A OR B

Branch coverage requires that the decision (A OR B) evaluates to both True and False at least once.

  • •A OR B = FALSE → both A and B must be False
  • •A OR B = TRUE → at least one must be True

(c) covers both branches:

Test caseABA OR BBranch
1FalseFalseFALSEFALSE path
2TrueTrueTRUETRUE path

Why not others:
- (a) (False, True) → only TRUE branch covered; no FALSE branch
- (b) (False, True) and (True, False) → both give TRUE; FALSE branch never covered
- (d) Three test cases — covers both branches but is redundant; not the minimal set

Key rule: Branch coverage = every decision outcome (TRUE/FALSE) must occur at least once. For OR, getting FALSE requires all conditions to be False.

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