LEXICAL ANALYSIS
ROLE OF THE LEXICAL ANALYZER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Context-free grammar can be used to specify both lexical and syntax rules.
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Type checking is done before parsing.
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High-level language programs can be translated to different Intermediate Representations.
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Arguments to a function can be passed using the program stack.
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Detailed explanation-1: -Type checking performs at the semantic analysis phase, and parsing performs at the syntax analysis phase. Since the Syntax analysis phase comes before semantic analysis, therefore Type Checking is always done after parsing. Therefore Option 2 is false and is the correct answer.
Detailed explanation-2: -Type checking is done at semantic analysis phase and parsing is done at syntax analysis phase. And we know Syntax analysis phase comes before semantic analysis. So Option (B) is False.
Detailed explanation-3: -The false statement is option ‘D’ which says that context-sensitive language is a subset of context-free language. This statement is not true because context-free languages are a subset of context-sensitive languages, not the other way around.
Detailed explanation-4: -B) Type checking is done during syntax analysis phase.
Detailed explanation-5: -Type checking in compiler design is an essential aspect of compiler design that involves verifying the types of expressions used in a program or source code. It is the process of ensuring that the type of a variable or expression is compatible with its context of use.