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In a bottom-up evaluation of a syntax directed definition its inherited attributes can do which of the following?

Always evaluated

Can be evaluated if the definition is L attributed

Can be evaluated if the definition has synthesized attributes

Never be evaluated

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A top down parser generates __________

Rightmost Derivation

Right most derivation in reverse

Left most derivation

Left most derivation in reverse

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MCQ

A bottom-up parser generates

Left-most derivation in reverse

Left-most derivation

Right-most derivation in reverse

Right

Discussion

MCQ

The action of parsing the source program into proper syntactic classes is called __________

Syntax Analysis

Lexical Analysis

Interpretation analysis

General Syntax Analysis

Discussion

MCQ

Consider the grammar.

E ? E + n | E



            
                                                            
                            
                            A
                            
                                n, E + n and E + n                             
                        
                                            
                            
                            B
                            
                                n, E + n and E + n                             
                        
                                            
                            
                            C
                            
                                n, n + n and n + n                             
                        
                                            
                            
                            D
                            
                                n, E + n and E                             
                        
                                                

            
                Correct Answer: D
                E ? E + n {Applying E ? E + n }
? E + E * n {Applying E ? E * n }
? E + n * n {Applying E ? n }
? n + n * n {Applying E ? n }.



        
            
            
                            
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                MCQ            
            
        

        
            
                5.
                LR parsers are attractive because _________
            

            
                                                            
                            
                            A
                            
                                It can be constructed to recognize CFG corresponding to almost all programming constructs                            
                        
                                            
                            
                            B
                            
                                It does not backtrack                            
                        
                                            
                            
                            C
                            
                                It can be constructed to recognize CFG corresponding to almost all programming constructs & It does not backtrack                            
                        
                                            
                            
                            D
                            
                                None of the mentioned                            
                        
                                                

            
                Correct Answer: C
                These above mentioned are the reasons why LR parser is considered to be attractive
            
        

        
            
            
                            
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