GATE Computer Science (CS) 2021 Shift 2 Solved Paper

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Question : 48 of 65
 
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For a statement S in a program, in the context of liveness analysis, the following sets are defined:
USE(S): the set of variables used in S
IN(S): the set of variables that are live at the entry of S
OUT(S): the set of variables that are live at the exit of S
Consider a basic block that consists of two statements, S1 followed by S2.
Which one of the following statements is correct?
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