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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Q. Which of the following does not support regular expressions?

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Q. Lexemes can be referred to as:

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Q. If the lexical analyser finds a lexeme with the same name as that of a reserved word,it _________

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Q. The methodology to show an error when the analyzer faces a keyword over an user’s input is based on:

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Q. State true or false:
Statement: A lexical analyzer reads the source code line by line.

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Q. The scanner outputs:

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Q. The phase of compilation which involves type checking is:

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