GATE CS 2022 Set 1 — Question 13
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Compiler Design → Code Optimization → CLR(1) & LALR(1)
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Question
Which one of the following statements is TRUE?
Correct answer
(D) LR(1) parsing is sufficient for deterministic context-free languages.
Solution
Option (D) is correct. parsers are capable of parsing all Deterministic Context-Free Languages (DCFLs).Option (A) is incorrect. The construction of an parser involves merging states from the automaton that have the same core items. This merging process can introduce Reduce-Reduce conflicts (but not Shift-Reduce conflicts), even if the original parser was conflict-free.Option (B) is incorrect. The symbol table is a data structure used throughout the compilation process, including syntax analysis, semantic analysis, and code generation, not just lexical analysis.Option (C) is incorrect. Data flow analysis is a technique used primarily for code optimization (e.g., constant propagation, liveness analysis), not for run-time memory management.
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