Question

What kind of expressions do we used for pattern matching?

(a) Regular Expression

(b) Rational Expression

(c) Regular & Rational Expression

(d) None of the mentioned

I have been asked this question in an interview for job.

This question is from Converting Regular Expressions to Automata in section Regular Expressions and Languages of Automata Theory

Answer 1

The correct answer is (c) Regular & Rational Expression

For explanation I would say: In automata theory, Regular Expression(sometimes also called the Rational Expression  ) is a sequence or set of characters that define a search pattern, mainly for the use in pattern matching with strings or string matching.