TOP 20 MCQs of Operating System for Competitive exams

In this post, we will discuss the top 20 most asked MCQs of operating system. If you are preparing for govt jobs then this topic is very important. You can also read our post on Top 20 MCQs of fundamentals of computers.

1.) FAT stands for?

  1. File Access Tape
  2. File Accommodation Table
  3. File Allocation Table
  4. File Activity Table

2.) DOS stands for?

  1. Document Operating System
  2. Disk Operating System
  3. Digital Operating System
  4. None of these

3.) Which one of these is an Operating System?

  1. MS-DOS
  2. MS-Word
  3. MS-Office
  4. MS-Access

4.) Linux is which type of operating system?

  1. Microsoft
  2. Open-Source
  3. Windows
  4. Mac

5.) Which of the following is not an operating system?

  1. Windows
  2. Linux
  3. Oracle
  4. DOS

6.) First Operating system was developed in?

  1. 1948
  2. 1949
  3. 1951
  4. 1950

7.) Which one of the following is a notepad extension?

  1. .txt
  2. .xlx
  3. .ppt
  4. .bmp

8.) DSM stands for?

  1. Direct System Module
  2. Direct System Memory
  3. Distributed Shared Memory
  4. Demoralized System Memory

9.) Which one of the following is a Single-User Operating System?

  1. Windows
  2. MAC
  3. MS-DOS
  4. None of these

10.) Which one of the following is not an Application Software?

  1. Windows 7
  2. Photoshop
  3. Workpad
  4. MS-Excel

11.) Which windows does not have a start button?

  1. Windows 8
  2. Windows 7
  3. None of these
  4. Windows XP

12.) Which of the following is a system software?

  1. Operating System
  2. Compiler
  3. Utilities
  4. All of the above

13.) What types of commands are required to perform tasks in DOS?

  1. External Commands
  2. Internal Commands
  3. Primary Commands
  4. Valuable Commands

14.) Which one of the following is an example of a real time operating system?

  1. MAC
  2. Windows 10
  3. MS-Dos
  4. Process Control

15.) Which one of the following can block the running process?

  1. Read
  2. Down
  3. Fork
  4. All of the above

16.) The size of virtual memory is based on?

  1. CPU
  2. Data Bus
  3. RAM
  4. Address Bus

17.) If page size increases then internal fragmentation also?

  1. Increases
  2. Decreases
  3. Remains constant
  4. None of the above

18.) IDL stands for?

  1. Interface Data Library
  2. Interface Direct Language
  3. None of the above
  4. Interface Definition Language

19.) BIOS is used by?

  1. Compiler
  2. Operating System
  3. Interpreter
  4. Application Software

20.) MS Windows operating Systems were proposed in?

  1. 1990
  2. 1991
  3. 1993
  4. 1985

In this post, we have discussed the Top 20 MCQs of Operating System for Competitive exams. In next post, we will discuss previous year questions which were asked in the exams.

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