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What does it mean when we say a Swift switch statement must be exhaustive?

easy📝 Conceptual Q11 of 15
Swift - Control Flow
What does it mean when we say a Swift switch statement must be exhaustive?
AIt must handle all possible values of the variable being switched on.
BIt can skip some cases if they are unlikely to happen.
CIt only needs to handle the first case it matches.
DIt must have at least two cases.
Step-by-Step Solution
Solution:

  1. Step 1: Understand the meaning of exhaustive switch

    In Swift, a switch must cover every possible value of the variable it checks to avoid missing cases.

  2. Step 2: Compare options to definition

    Only It must handle all possible values of the variable being switched on. states that all possible values must be handled, which matches the requirement.

  3. Final Answer:

    It must handle all possible values of the variable being switched on. -> Option A

  4. Quick Check:

    Exhaustive means all cases covered = A [OK]
Quick Trick: Remember: switch covers all cases or uses default [OK]
Common Mistakes:
  • Thinking switch can skip cases
  • Believing only first match matters
  • Assuming minimum number of cases

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