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Assertion (A): Iterative data flow analysis is guaranteed to terminate.
Reason (R): Each iteration changes the sets only in one direction and the lattice of possible values has finite height.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Both are true and the reason gives the mechanism, and it is the standard termination argument. Monotone transfer functions over a finite lattice cannot cycle, so the iteration must reach a fixed point in a bounded number of rounds.

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