Operating System MCQ Questions and Answers

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MCQ Questions and Answers on Computer Networking

1. Computer system divided into
(a) one components
(b) three components
(c) two components
(d) four components

2. Main purpose of operating system is
(a) computer system convenient to use
(b) use the computer hardware in an efficient manner
(c) both (a) and (b) above
(d) none of the above

3. An operating system is
(a) intermediary between use of computer and the computer hardware
(b) similar to a government
(c) both (a) and (b) above
(d) none of the above

4. Turn around time is defined as
(a) delay between job submission and job completion
(b) waiting time
(c) both (a) and (b) above
(d) none of these

5. Operating system is resident in memory of
(a) upper part
(b) middle part
(c) lower part
(d) all of the above

6. Card reader is a example of
(a) batch operating system
(b) multi-tasking
(c) multiprogramming
(d) none of these

7. Line pointer is
(a) online device
(b) off line device
(c) both (a) and (b) above
(d) none of these

8. Time sharing systems must also provide
(a) online system
(b) off line system
(c) none of these
(d) both (a) and (b) above

9. Multiprocessors is used because
(a) it saved money compared to multiple single systems
(b) they increase reliability
(c) distributed capability
(d) all of the above

10. Main function of distributed system is
(a) Resource sharing
(b) Reliability
(c) compilation speed up
(d) all of the above

11. Types of real time system is/are
(a) soft real time system
(b) hard real time system
(c) none of the above
(d) both (a) and (b) above

12. Restrictive type of real time system is called
(a) soft real time system
(b) hard real time system
(c) none of these
(d) both (a) and (b) above

13. An example of soft real time system is
(a) Multimedia
(b) under sea exploration
(c) virtual reality
(d) all of these

14. An example of hard real time system
(a) Robotics
(b) industrial control
(c) none of the these
(d) both (a) and (b) above

15. Operating system
(a) links a program with subroutine it references
(b) provides a layered, user friendly interface
(c) enables the programmer to draw a flow chart.
(d) all of the above

16. Thrashing can be avoided if
(a) the pages, belong to the working set of the programs are in main memory
(b) the speed of CPU is increased
(c) the speed I/O processor is increased
(d) all of the above.

17. Thrashing
(a) is a natural consequence of virtual memory system
(b) can always be avoided by swapping
(c) always occurs on large computers
(d) can be caused by poor paging algorithms

18. Multiprogramming was made possible by
(a) input/output units that operate independently of the CPU
(b) operating systems
(c) both (a) and (b) above
(d) none of the above

19. The term “operating system” means
(a) a set of program which controls computer working
(b) the way a computer operator works
(c) conversion of high level language into machine code
(d) the way a floppy disk drive operates

20. What is the name of the operating system that reads and reacts in terms of actual time?
(a) Batch system
(b) Real time system
(c) Quick response system
(d) Time sharing system

21. Two basic types of operating systems are
(a) sequential and direct
(b) sequential and real time
(c) batch and time share
(d) time and interactive

22. Which of the following is not a part of the operating system?
(a) Supervisor
(b) Jobd control program
(c) performance monitor
(d) input/output control program

23. Which of the following is not an advantage of multiprogramming?
(a) Increased through put
(b) Decreased operating system overhead
(c) Shorter response time
(d) Ability to assign priorities to jobs

24. All the time a computer is switched on, its operating system software has to stay in
(a) main storage
(b) floppy desk
(c) primary storage
(d) disk drive

25. The primary job of the operating system is to
(a) command resources
(b) provide utilities
(c) manage resources
(d) be user friendly

26. Which of the following software types is used to simplify using system software?
(a) Spreadsheet
(b) time sharing
(c) operating environment
(d) multi-tasking

27. If we want to execute more than one program at a time, the system software you are using must be capable of
(a) word processing
(b) coupling
(c) virtual memory
(d) multi-tasking

28. A front end processor used in
(a) Multiprogramming
(b) time sharing
(c) virtual storage
(d) multiprocessing

29. Remote computing services involve the use of time sharing and
(a) Multiprocessing
(b) batch processing
(c) interactive processing
(d) real time processing

30. Operating system is
(a) a collection of hardware components
(b) a collection of input-output devices
(c) a collection of software routines
(d) all of the above

31. Characteristic of an on line real time system is
(a) more than one CPU
(b) off line batch processing
(c) no delay in processing
(d) all of these

32. Spooling is most beneficial in multiprogramming environment where
(a) most jobs are CPU-bound
(b) most jobs are I/O bound
(c) jobs are evenly divided as I/O bound and CPU bound
(d) there is limited primary memory and need for secondary memory

33. Software that measures, monitors, analyses and controls real-word events is called
(a) system software
(b) scientific software
(c) real-time software
(d) business software

34. The state transition initiated by the user process itself in an operating system is
(a) Block
(b) wake up
(c) dispatch
(d) timer runout

35. Special software to create a Job Queue is called a
(a) Drive
(b) Interpreter
(c) Spooler
(d) linkage editor

36. The operating system manages
(a) Memory
(b) disks and I/O devices
(c) processor
(d) all of these

37. Block cache and buffer caches are used
(a) to improve disk performance
(b) to handle interrupts
(c) to increase the capacity of the main memory
(d) to speed up main memory read operation

38. A computer cannot “boot” if it does not have
(a) Compiler
(b) operating system
(c) loader
(d) assembler

39. Real time systems are
(a) primarily used on main frame computers
(b) used for monitoring events as they occur
(c) used for program analysis
(d) used for real time interactive users

40. Which of the following is characteristics of an operating system?
(a) Resource management
(b) Memory management
(c) Error recovery
(d) All of these

41. UNIX operating system
(a) is multi-user
(b) can run on PC’s and larger system
(c) is multi-tasking
(d) all of the above

42. Which of the following is not an operating system?
(a) UNIX
(b) PASCAL
(c) MS-DOS
(d) CP/M

43. The most popular 16-bit operating system is
(a) CP/M
(b) MS-DOS
(c) UNIX
(d) TRS-DOS

44. Windows is an
(a) operating system
(b) operating environment
(c) user interface
(d) programming platform

45. What is the operating system used by Macintosh computer ?
(a) System 7.0
(b) Xenix
(c) AU/X
(d) Either (a) or (b) above

46. The major operating system used in computers
(a) MS-DOS
(b) UNIX
(c) OS/2
(d) All of these

47. Which of the following operating system uses write through catches?
(a) UNIX
(b) ULTRIX
(c) DOS
(d) XENIX

48. Which are the most important features of Microsoft windows program?
(a) Windows
(b) ICONS
(c) pull-down menus
(d) all of these

49. What is the name of the operating system which was originally designed by scientists and engineers for use by scientist and engineers ?
(a) Xenix
(b) OS/2
(c) UNIX
(d) MS/DOS

50. Multiprocessing models have
(a) symmetric multiprocessing model
(b) unsymmetric multiprocessing model
(c) both (a) and (b) above
(d) none of these

51. How many types of multiprocessing model are there?
(a) One
(b) Three
(c) Two
(d) four