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Logic & Puzzles

If a system continually updates a counter during processing, which guarantee does a loop invariant provide about the counter's value?

A)Value decreases each iteration
B)Remains within specified bounds
C)Increases monotonically without bound
D)Equals the initial value always

💡 Explanation

A loop invariant establishes conditions that remain true before and after each loop iteration; because the counter's value is continually checked against specified bounds via the loop invariant, the value will remain within those bounds throughout the process. Therefore, 'Remains within specified bounds' is correct, rather than decreasing/increasing indefinitely, as the invariant prevents such behavior.

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