MCQ IN COMPUTER SCIENCE & ENGINEERING

COMPUTER SCIENCE AND ENGINEERING

COMPILER DESIGN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
output of lex program is
A
lex.c
B
lex.yy.c
C
lex.l
D
lex.yy.l
Explanation: 

Detailed explanation-1: -It is a tool or software which automatically generates a lexical analyzer (finite Automata). It takes as its input a LEX source program and produces lexical Analyzer as its output.

Detailed explanation-2: -yylex() returns a value indicating the type of token that has been obtained. If the token has an actual value, this value (or some representation of the value, for example, a pointer to a string containing the value) is returned in an external variable named yylval.

Detailed explanation-3: -Explanation: The output of Lex is a string of tokens.

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