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Syntax Analysis, Semantic Analysis And Code Generation : MCQs & PYQs with Explanation

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Syntax Analysis, Semantic Analysis And Code Generation : Solved MCQs and PYQs

This section contains carefully selected MCQs and Previous Year Questions with explanations to help students understand concepts and prepare effectively for examinations, interviews, and competitive tests.

Topics Covered
Context-Free Grammar Syntax Analysis Parsing Parse Trees Derivation Leftmost And Rightmost Derivation Ambiguous Grammar Top-Down Parsing Bottom-Up Parsing Recursive Descent Predictive Parsing LL Parsing Shift-Reduce Parsing LR Parsing SLR CLR LALR FIRST And FOLLOW Operator Precedence Parsing Syntax-Directed Translation Semantic Analysis Type Checking Intermediate Representation Three-Address Code Quadruples Triples Indirect Triples Intermediate Code Generation Code Generation Target Code Instruction Selection Register Allocation

Q: 1Which one of the following tools generates parser from BNF notation?

A

lex

B

yacc

C

ed

D

gdb

Option B

YACC (Yet Another Compiler Compiler) is a tool used to generate a parser from grammar specifications written in BNF (Backus–Naur Form).
It takes the grammar rules of a programming language as input and produces a Syntax Analyzer (Parser) that checks whether the input program follows those rules.

  • The lex is used to generate a lexical analyzer.
  • The ed is a text editor.
  • The gdb is a debugger.

Q: 2What is the alternative name of Parsing?

A

Syntax Analysis

B

Sematic Analysis

C

Compilation

D

Lexical Analysis

Option A

Parsing is the process of analyzing the grammatical structure of a program according to the rules of a programming language. Therefore, parsing is also known as Syntax Analysis.
It is a phase of a compiler that comes after Lexical Analysis. In this phase, the compiler checks whether the sequence of tokens follows the correct syntax or grammar rules.

TermPurpose
Lexical AnalysisConverts program into tokens.
Syntax Analysis (Parsing)Checks grammatical structure.
Semantic AnalysisChecks meaning and validity.
CompilationComplete translation process.

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