SYNTAX ANALYSIS
ROLE OF THE PARSER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Kleen closure
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Concatenation
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Union
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Epsilon
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Detailed explanation-1: -The regular-expression operator star has the highest precedence and is left associative.
Detailed explanation-2: -In regular expressions, the ‘ * ‘, ‘ + ‘, and ‘ ? ‘ operators, as well as the braces ‘ ‘ and ‘ ‘, have the highest precedence, followed by concatenation, and finally by ‘ | ‘. As in arithmetic, parentheses can change how operators are grouped.
Detailed explanation-3: -(i) The regular expression operators have the following order of precedence (in decreasing order): star, concatenation, union.; 0 + 10 means 0 + (10), not (0 + 1)0. left or right association does not really matter.)
Detailed explanation-4: -Order of precedence: Kleene star has the highest precedence, followed by concatenation, and then union.