Question Discussion & Solution

MCQ

In operator precedence parsing whose precedence relations are defined _________

For all pair of non-terminals

For all pair of terminals

To delimit the handle

None of the mentioned

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MCQ

Which of these is true about LR parsing?

Is most general non-backtracking shift-reduce parsing

It is still efficient

Is most general non-backtracking shift-reduce parsing & It is still efficient

None of the mentioned

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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

Discussion

MCQ

Compute E.value for the root of the parse tree for the expression:2 # 3 & 5 # 6 &4.

120

160

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MCQ

In which way a macro processor for assembly language can be implemented?

Independent one-pass processor

Processor put into pass 1 of a standard two pass assembler

All of the mentioned

Discussion

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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