Q. Which of the following pairs is the most powerful?

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Q. Consider the following grammar G.
S → F ⎪ H

F → p ⎪ c

H → d ⎪ c

Which one is true?

S1: All strings generated by G can be parsed with help of LL (1).

S2: All strings generated by G can be parsed with help of LR (1).

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Q. What is the maximum number of reduce moves that can be taken by a bottom-up parser for a grammar with no epsilon- and unit-production to parse a string with n tokens?

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Q. Consider the following two sets of LR (1) items of an LR (1) grammar.
X -> c.X, c/d

X -> .cX, c/d

X -> .d, c/d

X -> c.X, $

X -> .cX, $

X -> .d, $

Which one is false?

1. Cannot be merged since look ahead’s are different.

2. Can be merged but will result in S-R conflict.

3. Can be merged but will result in R-R conflict.

4. Cannot be merged since goto on c will lead to two different sets.

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Q. What is the binary equivalent of the decimal number 368

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Q. AB+(A+B)’ is equivalent to

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Q. Which of the following is the fastest logic ?

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Q. A latch is constructed using two cross coupled

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Q. DAG representation of a basic block allows

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Q. Which of the following actions an operator precedence parser may take to recover from an error?

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Q. Which of the following is used for grouping of characters into tokens?

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Q. A optimizing compiler

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Q. Input to code generator

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Q. A synthesized attribute is an attribute whose value at a parse tree node depends on

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Q. In a bottom up evaluation of a syntax direction definition ,inherited attributes can

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Q. _________ or scanning is the process where the stream of characters making up the source program is read from left to right and grouped into tokens.

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Q. _____________ is a graph representation of a derivation

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Q. Which of the following symbols table implementation is based on the property of locality of reference?

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Q. Assume that the SLR parser for a grammar G has n1 states and the LALR parser for G has n2 states. Hence which one is true?

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Q. Which of these is also known as look-head LR parser?

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