Q. ΦL is equivalent to

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Q. Which of the following pair of regular expression are not equivalent?

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Q. Consider following regular expression

i) (a/b)*
ii) (a*/b*)*
iii) ((ϵ/a)b*)*

Which of the following statements is correct

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Q. What kind of expressions do we used for pattern matching?

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Q. Which of the following do Regexps do not find their use in?

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Q. Which of the following languages have built in regexps support?

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Q. The following is/are an approach to process a regexp:

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Q. Are the given two patterns equivalent?
(1) gray|grey

(2) gr(a|e)y

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Q. Which of the following are not quantifiers?

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Q. Which of the following cannot be used to decide whether and how a given regexp matches a string:

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Q. Conversion of a regular expression into its corresponding NFA :

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Q. Which among the following is not a UNIX command for regular expressions?

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Q. What is the significance of $ used in regular expression in UNIX?

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Q. Generate the regular expression to match blank lines

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Q. For the given syntax of sed, which among the following is not a correct option?
General syntax of sed: /pattern/action

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Q. What does grep do in UNIX?

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Q. State true or false:
Statement: A regular expression is a sequence of characters that represent a pattern.

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Q. Which of the following options support the given statement?
Statement: A regular expression could be a fixed word or describe something like more general.

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Q. What does the following segment of code does?
grep -i man heroes.txt

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Q. What does “X?” do regular expression operator?

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