COMPILER DESIGN

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TOOLS AND TECHNIQUES FOR COMPILER DESIGN

MISCELLENOUS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The character sequence forming a token is called as ____
A
pattern
B
symbol
C
lexeme
D
input
Explanation: 

Detailed explanation-1: -A lexeme is an actual character sequence forming a specific instance of a token, such as num. Pattern: A rule that describes the set of strings associated to a token. Expressed. as a regular expression and describing how a particular token can be formed.

Detailed explanation-2: -A Lexeme is a string of characters that is a lowest-level syntatic unit in the programming language. These are the “words” and punctuation of the programming language. A Token is a syntactic category that forms a class of lexemes. These are the “nouns", “verbs", and other parts of speech for the programming language.

Detailed explanation-3: -A lexical token may consist of one or more characters, and every single character is in exactly one token. The tokens can be keywords, comments, numbers, white space, or strings.

Detailed explanation-4: -Explanation: A lexeme is a string of characters that form a syntactic unit.

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