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When expression sum=3+2 is tokenized then what is the token category of 3?

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When expression sum=3+2 is tokenized then what is the token category of 3?

(a) Identifier

(b) Assignment operator

(c) Integer Literal

(d) Addition Operator

I got this question in a national level competition.

This is a very interesting question from Lexical Analyser in division Finite Automata and Regular Expression of Compiler

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Right answer is (c) Integer Literal

To elaborate: Lexeme

Token category

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