OPERATING SYSTEMS (DOS & WINDOWS 7)-50 MCQs

  OPERATING SYSTEMS (DOS & WINDOWS 7)-50 MCQs 

OPERATING SYSTEM – BASICS

1. An operating system is a:

a) Hardware device
b) Application software
c) System software
d) Utility program
Ans: c
Explanation: OS controls and manages computer hardware.

2. Which is the main function of an operating system?

a) Word processing
b) File management
c) Web browsing
d) Typing documents
Ans: b
Explanation: OS manages files, memory, and devices.

3. DOS stands for:

a) Disk Operating System
b) Data Operating Software
c) Digital Operating System
d) Device Operating System
Ans: a
Explanation: DOS manages disk-based operations.

4. DOS is a ______ interface operating system.

a) Graphical
b) Menu-driven
c) Command-line
d) Touch-based
Ans: c
Explanation: DOS works using text commands.

5. Windows 7 is a ______ operating system.

a) Command-line
b) Graphical
c) Single-user only
d) Text-based
Ans: b
Explanation: Windows uses GUI.

DOS – INTERNAL COMMANDS

6. Internal commands are:

a) Stored on disk
b) Loaded from external file
c) Part of COMMAND.COM
d) Stored in RAM permanently
Ans: c
Explanation: Internal commands load with DOS.

7. Which command displays files and folders?

a) COPY
b) DIR
c) DEL
d) REN
Ans: b
Explanation: DIR lists directory contents.

8. Which command clears the screen?

a) CLS
b) CLEAR
c) ERASE
d) RESET
Ans: a
Explanation: CLS clears DOS screen.

9. Which command is used to change directory?

a) CD
b) MD
c) RD
d) DIR
Ans: a
Explanation: CD changes current directory.

10. Which command creates a directory?

a) CD
b) MD
c) RD
d) COPY
Ans: b
Explanation: MD makes new directory.

11. Which command deletes a directory?

a) DEL
b) RD
c) ERASE
d) REMOVE
Ans: b
Explanation: RD removes directory.

12. Which command deletes a file?

a) DEL
b) COPY
c) TYPE
d) REN
Ans: a
Explanation: DEL deletes files.

13. Which command renames a file?

a) COPY
b) REN
c) MOVE
d) EDIT
Ans: b
Explanation: REN renames files.

14. TYPE command is used to:

a) Delete file
b) Display file content
c) Copy file
d) Rename file
Ans: b
Explanation: Shows text file content.

15. EXIT command is used to:

a) Shutdown computer
b) Restart system
c) Exit DOS
d) Clear screen
Ans: c
Explanation: Leaves command prompt.

DOS – EXTERNAL COMMANDS

16. External commands are:

a) Built into DOS
b) Stored as separate files
c) Always in RAM
d) Hardware-based
Ans: b
Explanation: They exist as separate program files.

17. FORMAT command is used to:

a) Copy files
b) Delete files
c) Prepare disk for use
d) Rename disk
Ans: c
Explanation: Formats storage media.

18. CHKDSK command checks:

a) Memory
b) Disk errors
c) Virus
d) Files only
Ans: b
Explanation: Checks disk integrity.

19. DISKCOPY command is used to:

a) Copy files
b) Copy disk
c) Format disk
d) Delete disk
Ans: b
Explanation: Copies entire disk.

20. XCOPY is used for:

a) Disk formatting
b) Advanced file copying
c) Renaming files
d) Viewing files
Ans: b
Explanation: Copies directories and subdirectories.

21. TREE command shows:

a) File size
b) Directory structure
c) Disk space
d) File content
Ans: b
Explanation: Displays folder hierarchy.

22. ATTRIB command is used to:

a) Change file attributes
b) Delete files
c) Copy files
d) Rename files
Ans: a
Explanation: Sets read-only, hidden, etc.

23. EDIT command is used to:

a) Format disk
b) Edit text files
c) Rename files
d) View disk
Ans: b
Explanation: DOS text editor.

24. External commands are loaded:

a) At system startup
b) When required
c) Always in memory
d) From BIOS
Ans: b
Explanation: Loaded when executed.

25. Which is an external command?

a) DIR
b) CLS
c) FORMAT
d) CD
Ans: c
Explanation: FORMAT is not built-in.

WINDOWS 7 – BASIC OPERATIONS

26. Windows 7 provides a:

a) Text interface
b) Graphical interface
c) Voice interface
d) Command-only interface
Ans: b
Explanation: Uses GUI.

27. Desktop is:

a) A folder
b) Main screen of Windows
c) Hardware
d) Application
Ans: b
Explanation: First screen after login.

28. Taskbar is used to:

a) Store files
b) Show running programs
c) Format disk
d) Control BIOS
Ans: b
Explanation: Shows open apps.

29. Start button is used to:

a) Shutdown only
b) Open programs and settings
c) Format computer
d) Open files only
Ans: b
Explanation: Access to apps & settings.

30. Recycle Bin stores:

a) Permanent files
b) Deleted files temporarily
c) System files
d) Backup files
Ans: b
Explanation: Files can be restored.

WINDOWS 7 – UTILITIES & FEATURES

31. Which utility removes unnecessary files?

a) Disk Cleanup
b) Disk Defragmenter
c) Backup
d) Restore
Ans: a
Explanation: Frees disk space.

32. Disk Defragmenter is used to:

a) Delete files
b) Arrange fragmented data
c) Scan virus
d) Copy files
Ans: b
Explanation: Improves performance.

33. Control Panel is used to:

a) Play music
b) Change system settings
c) Create documents
d) Browse internet
Ans: b
Explanation: System configuration.

34. Which feature allows multiple programs at once?

a) Multitasking
b) Multiprocessing
c) Single tasking
d) Booting
Ans: a
Explanation: OS runs many tasks.

35. Windows Explorer is used for:

a) Internet browsing
b) File management
c) Virus scanning
d) Disk formatting
Ans: b
Explanation: Manage files & folders.

36. Which feature provides security in Windows 7?

a) Firewall
b) Paint
c) Calculator
d) Notepad
Ans: a
Explanation: Protects system.

37. Shutdown option is used to:

a) Restart computer
b) Turn off computer
c) Log out user
d) Lock screen
Ans: b
Explanation: Power off system.

38. Windows 7 supports:

a) Single user
b) Multi-user environment
c) No users
d) One application
Ans: b
Explanation: Multiple user accounts allowed.

39. Which utility restores system to earlier state?

a) Backup
b) Restore
c) Disk Cleanup
d) Defragmenter
Ans: b
Explanation: System Restore.

40. Windows 7 is developed by:

a) Apple
b) Google
c) Microsoft
d) IBM
Ans: c
Explanation: Microsoft OS.

MIXED QUESTIONS

41. DOS is mainly used for:

a) Graphics
b) Commands
c) Gaming
d) Animation
Ans: b
Explanation: Command-based OS.

42. GUI stands for:

a) General User Interface
b) Graphical User Interface
c) Global User Interface
d) Graphic Utility Interface
Ans: b
Explanation: Visual-based interface.

43. Which OS is user-friendly?

a) DOS
b) UNIX
c) Windows 7
d) Assembly
Ans: c
Explanation: GUI-based.

44. File extension of DOS command files is:

a) .exe
b) .com
c) Both a and b
d) .txt
Ans: c
Explanation: Executable commands.

45. Which OS uses mouse and icons?

a) DOS
b) UNIX
c) Windows
d) Assembly
Ans: c
Explanation: GUI feature.

46. Which is faster to learn for beginners?

a) DOS
b) Windows 7
c) Assembly
d) UNIX
Ans: b
Explanation: User-friendly GUI.

47. Which command shows folder tree in DOS?

a) DIR
b) TREE
c) LIST
d) VIEW
Ans: b
Explanation: Displays directory structure.

48. Which Windows feature manages hardware devices?

a) Task Manager
b) Device Manager
c) Control Panel
d) Explorer
Ans: b
Explanation: Hardware management.

49. Operating system acts as a:

a) Translator
b) Interface between user & hardware
c) Virus scanner
d) Database
Ans: b
Explanation: OS connects user and machine.

50. Without OS, computer is:

a) Slow
b) Insecure
c) Useless
d) Fast
Ans: c
Explanation: OS is essential to operate computer.

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