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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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The address code involves _____________

Exactly 3 address

At most Three address

No unary operators

None of the mentioned

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Which of the following derivations does a top-down parser use while parsing an input string?

Leftmost derivation

Leftmost derivation in reverse

Rightmost derivation

Rightmost derivation in reverse

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An intermediate code form is ___________

Postfix Notation

Syntax Trees

Three address code

All of the mentioned

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A bottom-up parser generates

Left-most derivation in reverse

Left-most derivation

Right-most derivation in reverse

Right

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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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