Consider the following statements about the use of backpatching in a compiler:(I) Backpatching can b

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Question

Consider the following statements about the use of backpatching in a compiler:(I) Backpatching can be used to generate code for Boolean expressions in one pass.(II) Backpatching can be used to generate code for flow-of-control statements in one pass.Which ONE of the following options is CORRECT?

Accepted Answer

Correct Answer: (C) Both are correct.Concept — Backpatching: Backpatching is a one-pass technique for generating intermediate code when forward jump targets are unknown at generation time. A placeholder (incomplete jump) is stored in a list; once the target label is encountered, all pending jumps are filled in (backpatched).(I) TRUE: Boolean expressions with short-circuit evaluation generate truelist/falselist jump chains — backpatching resolves their targets in one pass.(II) TRUE: Flow-of-control statements (if-then-else, while loops) generate forward jumps resolved via backpatching in one pass. This is the standard Dragon Book (Aho et al.) technique.

Consider the following statements about the use of backpatching in a compiler:(I) Backpatching can be used to generate code for Boolean expressions in one pass.(II) Backpatching can be used to generate code for flow-of-control statements in one pass.Which ONE of the following options is CORRECT?

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Consider the following statements about the use of backpatching in a compiler:(I) Backpatching can be used to generate code for Boolean expressions in one pass.(II) Backpatching can be used to generate code for flow-of-control statements in one pass.Which ONE of the following options is CORRECT?

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