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MCQ

Match the following.

   List-I                  List-II
A. Lexical analysis       1. Graph coloring
B. Parsing                2. DFA minimization
C. Register allocation    3. Post-order traversal
D. Expression evaluation  4. Production tree

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the predictive parser puts some constraints on the grammar and accepts only a class of grammar known as LL(k) grammar.

TRUE

FALSE

Can be true or false

Can not say

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Which of the following statements is false?

Left as well as right most derivations can be in Unambiguous grammar

An LL (1) parser is a top-down parser

LALR is more powerful than SLR

Ambiguous grammar can

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Which of the following is the fastest logic?

TTL

ECL

CMOS

LSI

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A grammar that produces more than one parse tree for some sentence is called __________

Ambiguous

Unambiguous

Regular

None of the mentioned

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MCQ

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



            
                                                            
                            
                            A
                            
                                1 only                            
                        
                                            
                            
                            B
                            
                                2 only                            
                        
                                            
                            
                            C
                            
                                1 and 4 only                            
                        
                                            
                            
                            D
                            
                                1, 2, 3 and 4 only                            
                        
                                                

            
                Correct Answer: D
                All these are valid reasons.



        
            
            
                            
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