Question 21 : System program such a s compiler are designed so that they are
1. Re-enterable
2. Non reusable
3. Serially usable
4. None of the mentioned
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Question 22 : Which of the following is a phase of a compilation process?
1. Lexical Analysis
2. Code Generation
3. Lexical Analysis & Code Generation
4. None of the mentioned
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Question 23 : Advantage of incorporating the macro-processor into pass 1 is that
1. Many functions have to be implemented twice
2. Functions are combined not necessarily creating intermediate files as output from the macro-processor and input to the assembler
3. More flexibility is provided to the programmer in that he may use all the features of the assembler in conjunction with macros
4. All of the mentioned
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Question 24 : The construction of the canonical collection of the sets of LR (1) items are similar to the construction of the canonical collection of the sets of LR (0) items. Which is an exception?
1. Closure and goto operations work a little bit different
2. Closure and goto operations work similarly
3. Closure and additive operations work a little bit different
4. Closure and associatively operations work a little bit different
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Question 25 : When ß ( in the LR(1) item A -> ß.a,a ) is not empty, the look-head
1. Will be affecting.
2. Does not have any affect.
3. Shift will take place.
4. Reduction will take place.
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Question 26 : When there is a reduce/reduce conflict?
1. If a state does not know whether it will make a shift operation using the production rule i or j for a terminal.
2. If a state does not know whether it will make a shift or reduction operation using the production rule i or j for a terminal.
3. If a state does not know whether it will make a reduction operation using the production rule i or j for a terminal.
4. None of the mentioned
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Question 27 : If a state does not know whether it will make a shift operation or reduction for a terminal is called
1. Shift/reduce conflict
2. Reduce /shift conflict
3. Shift conflict
4. Reduce conflict
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Question 28 : Which of the following is incorrect for the actions of A LR-Parser I) shift s ii) reduce A->ß iii) Accept iv) reject?
1. Only I)
2. I) and ii)
3. I), ii) and iii)
4. I), ii) , iii) and iv)
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Question 29 : Which of these is true about LR parsing?
1. Is most general non-backtracking shift-reduce parsing
2. It is still efficient
3. Both a and b
4. None of the mentioned
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Question 30 : An LR-parser can detect a syntactic error as soon as
1. The parsing starts
2. It is possible to do so a left-to-right scan of the input.
3. It is possible to do so a right-to-left scan of the input.
4. Parsing ends
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