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Solve cups logic puzzle with one true statement

BitkernelSoftware Engineer · Online Assessment
MediumSoftware EngineerOnline AssessmentSoftware Engineering Fundamentals

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This question evaluates logical reasoning and propositional-logic skills, assessing the ability to analyze mutually dependent statements and derive consistent conclusions within a constraint-satisfaction context.

There are 4 cups on a table. Each cup has a statement written on it:

  • Cup 1 says: All cups contain fruit candy.
  • Cup 2 says: This cup contains apples.
  • Cup 3 says: This cup does not contain chocolate.
  • Cup 4 says: Some cups do not contain fruit candy.

Exactly one of these four statements is true.

Which of the following must be true?

Options:

  • A. All cups contain fruit candy.
  • B. No cup contains fruit candy (all cups lack fruit candy).
  • C. No cup contains apples.
  • D. The third cup contains chocolate.