Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following statement is true?a)SL...
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Which of the following statement is true?
- a)SLR powerful than LALR
- b)LALR powerful than Canonical LR parser
- c)Canonical LR powerful than LALR parser
- d)The parsers SLR= Canonical LR=LALR
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
Which of the following statement is true?a)SLR powerful than LALRb)LAL...
LR >LALR>SLR In terms of parser.
Most Upvoted Answer
Which of the following statement is true?a)SLR powerful than LALRb)LAL...
Explanation:
LR parsers are bottom-up parsers that are capable of parsing a large class of context-free grammars. There are three types of LR parsers: SLR, LALR, and Canonical LR.
Canonical LR Parser:
The Canonical LR parser is the most powerful of the three. It is capable of parsing all types of context-free grammars. However, it requires more memory and time than the other two parsers. The Canonical LR parser constructs a parse table that is based on the entire grammar. This parser uses a set of LR(1) items and a deterministic finite automaton to parse the input.
LALR Parser:
The LALR parser is less powerful than the Canonical LR parser but more powerful than the SLR parser. It is capable of parsing a large class of context-free grammars. The LALR parser constructs a parse table that is based on a reduced version of the grammar. This parser uses a set of LR(0) items and a deterministic finite automaton to parse the input.
SLR Parser:
The SLR parser is the least powerful of the three. It is capable of parsing a small class of context-free grammars. The SLR parser constructs a parse table that is based on a simplified version of the grammar. This parser uses a set of LR(0) items and a deterministic finite automaton to parse the input.
Conclusion:
From the above explanation, it can be concluded that the Canonical LR parser is more powerful than the LALR parser, which is more powerful than the SLR parser. Therefore, option 'C' is the correct answer.
LR parsers are bottom-up parsers that are capable of parsing a large class of context-free grammars. There are three types of LR parsers: SLR, LALR, and Canonical LR.
Canonical LR Parser:
The Canonical LR parser is the most powerful of the three. It is capable of parsing all types of context-free grammars. However, it requires more memory and time than the other two parsers. The Canonical LR parser constructs a parse table that is based on the entire grammar. This parser uses a set of LR(1) items and a deterministic finite automaton to parse the input.
LALR Parser:
The LALR parser is less powerful than the Canonical LR parser but more powerful than the SLR parser. It is capable of parsing a large class of context-free grammars. The LALR parser constructs a parse table that is based on a reduced version of the grammar. This parser uses a set of LR(0) items and a deterministic finite automaton to parse the input.
SLR Parser:
The SLR parser is the least powerful of the three. It is capable of parsing a small class of context-free grammars. The SLR parser constructs a parse table that is based on a simplified version of the grammar. This parser uses a set of LR(0) items and a deterministic finite automaton to parse the input.
Conclusion:
From the above explanation, it can be concluded that the Canonical LR parser is more powerful than the LALR parser, which is more powerful than the SLR parser. Therefore, option 'C' is the correct answer.
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Which of the following statement is true?a)SLR powerful than LALRb)LALR powerful than Canonical LR parserc)Canonical LR powerful than LALR parserd)The parsers SLR= Canonical LR=LALRCorrect answer is option 'C'. Can you explain this answer?
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