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31. 

Which of the following statement is true.
A. The LRU algorithm pages out pages that have been used recently
B. Thrashing is a natural consequence of virtual memory systems.
C. Seek analysis is used for analysing control-unit busy problems.
D. All of the above
E. None of the above
32. 

Which of the following is a phase of a compilation process
A. Lexical analysis
B. Code generation
C. Both of the above
D. Static analysis
E. None of the above
33. 

Which are the most important features of Microsoft Windows program?
A. Windows
B. Pull-down menus
C. Icons
D. All of the above
E. None of the above
34. 

Which of the following system program forgoes the production of object code to generate absolute machine code and load it into the physical main storage location from which it will be executed immediately upon completion of the assembly?
A. two pass assembler
B. load-and-go assembler
C. macroprocessor
D. compiler
E. None of the above
35. 

Virtual memory is
A. simple to implement
B. used in all major commercial operating systems
C. less efficient in utilization of memory
D. useful when fast I/O devices are not available
E. None of the above