GATE CS 2017 Set 2 — Question 6
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Compiler Design → Syntax Analysis → CLR(1) & LALR(1)
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Question
Which of the following statements about parser is/are CORRECT?I. Canonical LR is more powerful than SLR.
II. SLR is more powerful than LALR.
III. SLR is more powerful than Canonical LR.
II. SLR is more powerful than LALR.
III. SLR is more powerful than Canonical LR.
Correct answer
(A) I only
Solution
The power hierarchy of LR parsers is: .
- Statement I: Canonical LR is more powerful than SLR. (True)
- Statement II: SLR is more powerful than LALR. (False, LALR is more powerful)
- Statement III: SLR is more powerful than Canonical LR. (False, CLR is more powerful)
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