26. The dispatcher
A. actually schedules the tasks into the processor
B. puts tasks in I/O wait
C. is always small and simple
D. never changes task priorities
E. None of the above
27. System programs such as Compilers are designed so that they are
A. reenterable
B. non reusable
C. serially usable
D. recursive
E. None of the above
28. IBM released its first PC in 1981. Can you name the operating system which was most popular at that time?
A. MS-DOS
B. PC-DOS
C. OS/360
D. CP/M
E. None of the above
29. If the number of bits in a virtual address of a program is 16 and the page size is 0.5 K bytes, the number of pages in the virtual address space is
A. 16
B. 32
C. 64
D. 128
E. None of the above
30. Which table is a permanent database that has an entry for each terminal symbol.
A. Terminal table
B. Literal table
C. Identifier table
D. Reductions
E. None of the above
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