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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            
            
        

        
            
                1.
                Find the TRUE statement?
I.  There exist parsing algorithms for some programming languages which has O(3) complexity.
II.  A programming language which allows recursion can be implemented with static storage allocation.
III. No L-attributed definition can be evaluated in The framework of bottom-up parsing.
IV. Code improving transformations can be performed at both intermediate code level and source Language.
            

            
                                                            
                            
                            A
                            
                                I and II                            
                        
                                            
                            
                            B
                            
                                I and IV                            
                        
                                            
                            
                            C
                            
                                III and IV                            
                        
                                            
                            
                            D
                            
                                I III and IV                            
                        
                                                

            
                Correct Answer: B
                In recursion, space used but recursive call can
            
        

        
            
            
                            
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                MCQ            
            
        

        
            
                2.
                The optimization which avoids test at every iteration is?
            

            
                                                            
                            
                            A
                            
                                Loop unrolling                            
                        
                                            
                            
                            B
                            
                                Loop jamming                            
                        
                                            
                            
                            C
                            
                                Constant folding                            
                        
                                            
                            
                            D
                            
                                None of the mentioned                            
                        
                                                

            
                Correct Answer: A
                Execution speed is enhanced by sacrificing bits.
            
        

        
            
            
                            
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                MCQ            
            
        

        
            
                3.
                In an absolute loading scheme which loader function is accomplished by assembler?
            

            
                                                            
                            
                            A
                            
                                Re-allocation                            
                        
                                            
                            
                            B
                            
                                Allocation                            
                        
                                            
                            
                            C
                            
                                Linking                            
                        
                                            
                            
                            D
                            
                                Loading                            
                        
                                                

            
                Correct Answer: A
                Large number variables onto a small number of CPU register.
            
        

        
            
            
                            
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                4.
                The action of parsing the source program into proper syntactic classes is called
            

            
                                                            
                            
                            A
                            
                                General syntax analysis                            
                        
                                            
                            
                            B
                            
                                Interpretation analysis                            
                        
                                            
                            
                            C
                            
                                Syntax analysis                            
                        
                                            
                            
                            D
                            
                                Lexical analysis                            
                        
                                                

            
                Correct Answer: D
                
            
        

        
            
            
                            
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                MCQ            
            
        

        
            
                5.
                The top-down parsing method is also called
            

            
                                                            
                            
                            A
                            
                                Operator precedence parsing                            
                        
                                            
                            
                            B
                            
                                Recursive descent parsing                            
                        
                                            
                            
                            C
                            
                                Shift reduce parsing                            
                        
                                            
                            
                            D
                            
                                None of these                            
                        
                                                

            
                Correct Answer: B
                Recursive descent parsing
            
        

        
            
            
                            
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