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MCQ

In ___________________, if one derivation of a production fails, the syntax analyzer restarts the process using different rules of same production

Bottom-up Parsing

Recursive descent parsing

Backtracking

All of the above

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MCQ

An optimizer Compiler __________

Is optimized to occupy less space

Is optimized to occupy less space & Optimize the code

Optimize the code

None of the mentioned

Discussion

MCQ

An LR-parser can detect a syntactic error as soon as __________

The parsing starts

It is possible to do so a left-to-right scan of the input

It is possible to do so a right-to-left scan of the input

Parsing ends

Discussion

MCQ

The process of assigning load addresses to the various parts of the program and adjusting the code and data in the program to reflect the assigned addresses is called

Assembly

Parsing

Relocation

Symbol resolute

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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                MCQ            
            
        

        
            
                5.
                Which one of the following is a top-down parser?
            

            
                                                            
                            
                            A
                            
                                Recursive descent parser                            
                        
                                            
                            
                            B
                            
                                Operator precedence parser                            
                        
                                            
                            
                            C
                            
                                An LR(k) parser                            
                        
                                            
                            
                            D
                            
                                An LALR(k) parser                            
                        
                                                

            
                Correct Answer: A
                Recursive Descent also known as top down parsing also known to be LL(1).
Consider the following two statements:
P: Every regular grammar is LL(1)
Q: Regular is LR(1) grammar.
            
        

        
            
            
                            
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