Q. Find a regular expression for a grammar which generates a language which states :
L contains a set of strings starting wth an a and ending with a b, with something in the middle.

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Q. Which of the following is the correct representation of grammar for the given regular expression?
a(aUb)*b

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Q. A CFG consist of the following elements:

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Q. A CFG for a program describing strings of letters with the word “main” somewhere in the string:

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Q. CFGs are more powerful than:

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Q. State true or false:
S-> 0S1|01

Statement: No regular expression exists for the given grammar.

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Q. For the given set of code, the grammar representing real numbers in Pascal has error in one of the six lines. Fetch the error.
(1) ->

(2) -> | epsilon

(3) -> | epsilon

(4) -> ‘E’ | epsilon

(5) -> + | – | epsilon

(6) -> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

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Q. Which among the following is incorrect with reference to a derivation tree?

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Q. Let G=(V, T, P, S)
where a production can be written as:

S->aAS|a

A->SbA|ba|SS

Which of the following string is produced by the grammar?

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Q. Statement 1: Ambiguity is the property of grammar but not the language.
Statement 2: Same language can have more than one grammar.

Which of the following options are correct with respect to the given statements?

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Q. Which of the following are non essential while simplifying a grammar?

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Q. Which of the following are context free language?

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Q. The language L ={a^i2b^i|i>=0} is:

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Q. L->rLt|tLr|t|r
The given grammar produces a language which is:

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