| 21. | Which of the following is false regarding the evaluation of computer programming languages? |
| a. | Application oriented features |
| b. | Efficiency and Readability |
| c. | Software development |
| d. | Hardware maintenance cost |
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Answer: (d).Hardware maintenance cost
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| 22. | Which of the following statements is false? |
| a. | Top-down parsers are LL parsers where first L stands for left-to-right scan and second L stands for a leftmost derivation. |
| b. | (000)* is a regular expression that matches only strings containing an odd number of zeroes, including the empty string. |
| c. | Bottom-up parsers are in the LR family, where L stands for left-to-right scan and R stands for rightmost derivation. |
| d. | The class of context-free languages is closed under reversal. That is, if L is any context-free language, then the language LR={WR:wϵL} is context free. |
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Answer: (b).(000)* is a regular expression that matches only strings containing an odd number of zeroes, including the empty string.
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| 23. | System calls are usually invoked by using: |
| a. | A privileged instruction |
| b. | An indirect jump |
| c. | A software interrupt |
| d. | Polling |
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Answer: (c).A software interrupt
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| 24. | The ............... transfers the executable image of a C++ program from hard disk to main memory. |
| a. | Compiler |
| b. | Linker |
| c. | Debugger |
| d. | Loader |
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Answer: (d).Loader
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| 25. | The family of context sensitive languages is ................. under union and ................. under reversal. |
| a. | closed, not closed |
| b. | not closed, not closed |
| c. | closed, closed |
| d. | not closed, closed |
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Answer: (c).closed, closed
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| 26. | Which is the correct statement(s) for Non Recursive predictive parser? S1: First(α) = {t | α => * t β for some string β } => *tβ S2: Follow(X) = { a | S => * αXa β for some strings α and β } |
| a. | Both statements S1 and S2 are incorrect |
| b. | S1 is incorrect and S2 is correct |
| c. | S1 is correct and S2 is incorrect |
| d. | Both statements S1 and S2 are correct |
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Answer: (d).Both statements S1 and S2 are correct
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| 27. | From the point of view of the programmer, what are the major advantages of using a high-level language rather than internal machine code or assembly language ? |
| a. | Program portability |
| b. | Easy development |
| c. | Efficiency |
| d. | None of the above |
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Answer: (b).Easy development
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| 28. | The scheme of which interpreter translates the source program is known as |
| a. | Paragraph by paragraph |
| b. | Instruction by instruction |
| c. | Line by line |
| d. | None of the above |
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Answer: (c).Line by line
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| 29. | Portable program means |
| a. | Program with wheels |
| b. | Independent from its authors |
| c. | Independent of platform |
| d. | None of the above |
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Answer: (c).Independent of platform
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| 30. | Object modules generated by assembler that contains unresolved external references are resolved for two or more object module by a/an |
| a. | Operating system |
| b. | Loader |
| c. | Linker |
| d. | Compiler |
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Answer: (c).Linker
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