Q. A symbol X is called to be useful if and only if its is:

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Q. A symbol X is ________ if there exists : S->* aXb

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Q. Grammar is checked by which component of compiler

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Q. __________ is the acyclic graphical representation of a grammar.

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Q. A grammar with more than one parse tree is called:

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Q. The number of leaves in a parse tree with expression E*(E) where * and () are operators

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Q. For the expression E*(E) where * and brackets are the operation, number of nodes in the respective parse tree are:

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Q. Which among the following is the root of the parse tree?

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Q. In which order are the children of any node ordered?

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Q. Which of the following statement is false in context of tree terminology?

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Q. The most suitable data structure used to represent the derivations in compiler:

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Q. L={0^i1^j2^k | j>i+k}
Which of the following satisfies the language?

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Q. Which among the following is the correct grammar for the given language?
L={x∈{0,1}*|number of zeroes in x¹number of one’s in x}

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Q. Which of the following languages are most suitable for implement context free languages ?

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Q. Which among the following is a CFG for the given Language:
L={x∈{0,1}*|number of zeroes in x=number of one’s in x}

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Q. A grammar G=(V, T, P, S) is __________ if every production taken one of the two forms:
B->aC

B->a

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Q. For the given Regular expression, the minimum number of terminals required to derive its grammar is:
(011+1)*(01)*

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Q. For the given Regular expression, the minimum number of variables including starting variable required to derive its grammar is:
(011+1)*(01)*

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Q. If L1 and L2 are context free languages, which of the following is context free?

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Q. What the does the given CFG defines?
S->aSbS|bSaS|e and w denotes terminal

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