Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > YACC builds upa)SLR parsing tableb)Canonical ...
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YACC builds up
- a)SLR parsing table
- b)Canonical LR parsing table
- c)LALR parsing table
- d)None of the mentioned
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
YACC builds upa)SLR parsing tableb)Canonical LR parsing tablec)LALR pa...
Explanation: It is a parser generator.
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YACC builds upa)SLR parsing tableb)Canonical LR parsing tablec)LALR pa...
YACC and Parsing Tables
Parsing tables are used in compiler construction to facilitate the process of syntax analysis. YACC (Yet Another Compiler Compiler) is a tool used to generate parsers for programming languages.
Types of Parsing Tables:
SLR Parsing Table:
- YACC is capable of building SLR parsing tables.
- SLR (Simple LR) parsing is a type of bottom-up parsing method that uses a lookahead symbol to make parsing decisions.
Canonical LR Parsing Table:
- YACC does not directly build Canonical LR parsing tables.
- Canonical LR parsing is a more powerful parsing method than SLR parsing, but it requires more memory and time to construct the parsing table.
LALR Parsing Table:
- YACC builds LALR (Look-Ahead LR) parsing tables.
- LALR parsing is a compromise between the power of Canonical LR parsing and the efficiency of SLR parsing. It uses a smaller parsing table while still being able to parse a wider range of grammars.
Conclusion:
YACC is a versatile tool that can generate parsing tables for different parsing methods. While it may not directly generate Canonical LR parsing tables, it is still capable of building SLR and LALR parsing tables, which are widely used in compiler construction.
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