Question

explain the mechanism to determine if an input string belongs to the language given apply all steps on following regular expressions

Answer 1

Explanation:

Suppose you have been on the Internet for a few years and have been very faithful about saving all your correspondence, just in case you (or your lawyers, or the prosecution) need a copy. The result is that you have a 5-gigabyte disk partition dedicated to saved mail. And let’s further suppose that you remember that somewhere in there is an email message from someone named Angie or Anjie. Or was it Angy? But you don’t remember what you called it or where you stored it. Obviously, you have to look for it.

But while some of you go and try to open up all 15,000,000 documents in a word processor, I’ll just find it with one simple command. Any system that provides regular expression support allows me to search for the pattern in several ways. The simplest to understand is:

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