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Operating System Practice Test Questions For All Competitive Exams
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An operating system (OS) is the program that, after being initially loaded into the computer by a boot program, manages all of the other application programs in a computer. The application programs on the computing device make use of the operating system by making requests for services through a defined application program interface (API).
 

Operating System Practice Test Questions For All Competitive Exams
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25 Questions

1. Which one of the following DOS command sends contents of the screen to an output device?
2. Which one of the following DIR commands lists a group of files?
3. A program in execution is called
4. This command is used to display a list of files and sub-directories that are in the directory you specify.
5. Every computer has a(n) ……, many also have ……
6. Which one of the following is not the function of operating system?
7. Which process refers to the starting up of a computer and the loading of the required parts of the operating system into the RAM?
8. Which of the following terms explains the execution of more than one file at the same on a single processor?
9. An operating system is a/an
10. Which process checks to ensure the components of the computer are operating and connected properly?
11. In MS-DOS, which of the following commands is used to delete directory with all sub-directories and files?
12. Which of the following is not usual file extension in DOS?
13. Which of the following is the main program of MS-DOS?
14. When a file contains instruction that can be carried out by the computer, it is often called a(n) …… file.
15. Which of the following is/are function(s) of operating system?
16. In DOS, the ‘label’ command is used to
17. Which command is used to delete file from a directory in DOS?
18. The simultaneously processing of two or more programs by multiple processors, is
19. Which of the following is the type of software that controls the internal operations in the computer?
20. Which one of the following file names is invalid in DOS?
21. Real time systems must have
22. Which of the following is the correct reason to use an operating system?
23. Which of the following operating systems is also known as single user operating system?
24. Which of the following refers to the means by which an OS or any other program interacts with the user?
25. Operating system that allows only one user to work on a computer at a time is known as

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