Computer Science Engineering (CSE) Exam > Computer Science Engineering (CSE) Questions > Which of the following statements is TRUE?a)S...
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Which of the following statements is TRUE?
- a)Symbol table is accessed only during the lexical analysis.
- b)LR (1) parsing is sufficient for DCFL.
- c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflict
- d)Data flow analysis is necessary for run time memory management.
Correct answer is option 'B,C,D'. Can you explain this answer?
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Which of the following statements is TRUE?a)Symbol table is accessed o...
Understanding the Statements
To determine which statements are true, let's analyze each one:
Statement A: Symbol table is accessed only during lexical analysis.
- This statement is FALSE.
- The symbol table is used not only during lexical analysis but also during semantic analysis and code generation. It maintains information about identifiers throughout the compilation process.
Statement B: LR (1) parsing is sufficient for DCFL.
- This statement is TRUE.
- LR (1) parsing can handle deterministic context-free languages (DCFL). It uses a single lookahead token, making it powerful enough to parse all DCFLs.
Statement C: The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflict.
- This statement is TRUE.
- If an LR (1) parser does not have a reduce/reduce (R/R) conflict, then the LALR (1) parser, which is essentially a simplified version of LR (1), will also not have such conflicts.
Statement D: Data flow analysis is necessary for run time memory management.
- This statement is TRUE.
- Data flow analysis helps track the flow of data in a program, which is essential for optimizing memory management during runtime, such as determining variable lifetimes and optimizing storage.
Conclusion
Thus, the correct answers are options B, C, and D. These statements reflect key concepts in compiler design and memory management that are foundational in computer science.
To determine which statements are true, let's analyze each one:
Statement A: Symbol table is accessed only during lexical analysis.
- This statement is FALSE.
- The symbol table is used not only during lexical analysis but also during semantic analysis and code generation. It maintains information about identifiers throughout the compilation process.
Statement B: LR (1) parsing is sufficient for DCFL.
- This statement is TRUE.
- LR (1) parsing can handle deterministic context-free languages (DCFL). It uses a single lookahead token, making it powerful enough to parse all DCFLs.
Statement C: The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflict.
- This statement is TRUE.
- If an LR (1) parser does not have a reduce/reduce (R/R) conflict, then the LALR (1) parser, which is essentially a simplified version of LR (1), will also not have such conflicts.
Statement D: Data flow analysis is necessary for run time memory management.
- This statement is TRUE.
- Data flow analysis helps track the flow of data in a program, which is essential for optimizing memory management during runtime, such as determining variable lifetimes and optimizing storage.
Conclusion
Thus, the correct answers are options B, C, and D. These statements reflect key concepts in compiler design and memory management that are foundational in computer science.
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Which of the following statements is TRUE?a)Symbol table is accessed o...
From given statements
Statements B, C, and D are true.
Statements B, C, and D are true.
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Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer?
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Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer?.
Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer?.
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Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer?, a detailed solution for Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? has been provided alongside types of Which of the following statements is TRUE?a)Symbol table is accessed only during the lexical analysis.b)LR (1) parsing is sufficient for DCFL.c)The LALR (1) parser for a grammar G cannot have R/R conflict if the LR (1) parser for G does not have R/R conflictd)Data flow analysis is necessary for run time memory management.Correct answer is option 'B,C,D'. Can you explain this answer? theory, EduRev gives you an
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