1. Alt + Tab is used to:
- switch between open windows
- open Task Manager
- lock the computer
- close a window
Answer: A) switch between open windows
Explanation: It cycles through open apps.
MCQs / Computer Science / Lab: Windows Operating System
Lab: Windows Operating System MCQs — Computer Science
22 multiple-choice questions on Lab: Windows Operating System from Computer Science, each with the correct answer and, where available, a teacher's explanation. Read through them to revise the chapter, then practise the same questions one by one to test yourself.
2. Ctrl + Z is used to:
- redo
- paste
- undo the last action
- zoom
Answer: C) undo the last action
Explanation: Ctrl + Y redoes.
3. The command to remove an empty folder is:
- cd
- rd
- md
- dir
Answer: B) rd
Explanation: rd = remove directory.
4. Windows Defender Firewall settings are found in:
- Ease of Access only
- System and Security
- Programs
- Clock and Region
Answer: B) System and Security
Explanation: Security-related settings are grouped there.
5. Changing the time zone is done in which Control Panel category?
- Hardware and Sound
- User Accounts
- Programs
- Clock and Region
Answer: D) Clock and Region
Explanation: Date, time and time zone settings.
6. Which shortcut opens Task Manager directly?
- Windows + T only
- Alt + F4
- Ctrl + Alt + Tab
- Ctrl + Shift + Esc
Answer: D) Ctrl + Shift + Esc
Explanation: It skips the security screen.
7. To close a program that is not responding you use Task Manager's:
- Uninstall
- Restore
- Format
- End task
Answer: D) End task
Explanation: Select the app under Processes → End task.
8. The command to create a new folder is:
- md
- rd
- cls
- dir
Answer: A) md
Explanation: md = make directory.
9. Changing a user's password or account type is done in:
- Programs
- Network and Internet
- Appearance and Personalization
- User Accounts
Answer: D) User Accounts
Explanation: User Accounts manages accounts.
10. The shortcut to open File Explorer is:
- Ctrl + E only
- Alt + F4
- Windows + D
- Windows + E
Answer: D) Windows + E
Explanation: E for Explorer.
11. A program is removed from Windows through:
- Task Manager → End task
- Command Prompt → cls
- Control Panel → Programs → Uninstall a program
- Recycle Bin
Answer: C) Control Panel → Programs → Uninstall a program
Explanation: Programs and Features uninstalls software.
12. The command cd Documents will:
- change the current folder to Documents
- create Documents
- delete Documents
- list Documents only
Answer: A) change the current folder to Documents
Explanation: cd = change directory.
13. Live graphs of CPU and memory usage are shown on Task Manager's:
- Users tab
- Performance tab
- Startup tab
- Recycle Bin
Answer: B) Performance tab
Explanation: Performance shows real-time usage.
14. The command used to clear the Command Prompt screen is:
- rd
- cls
- del
- clear all
Answer: B) cls
Explanation: cls = clear screen.
15. The command cd .. is used to:
- move up to the parent folder
- delete a folder
- create a folder
- clear the screen
Answer: A) move up to the parent folder
Explanation: .. means parent directory.
16. Programs that run automatically when Windows starts can be disabled from the:
- Performance tab
- Clock settings
- Startup (Startup apps) tab
- Paint menu
Answer: C) Startup (Startup apps) tab
Explanation: Disabling them speeds up booting.
17. The command used to list the contents of a folder is:
- rd
- cd
- md
- dir
Answer: D) dir
Explanation: dir = directory listing.
18. Which method selects several non-adjacent files?
- Alt + Tab
- Ctrl + click each file
- Shift + Delete
- F2
Answer: B) Ctrl + click each file
Explanation: Ctrl adds individual files to the selection.
19. Ctrl + X is used to:
- copy
- close
- cut
Answer: C) cut
Explanation: Cut removes the selection to the clipboard.
20. Windows + L is used to:
- lock the computer
- open Word
- open Explorer
- log off permanently
Answer: A) lock the computer
Explanation: Locks the screen quickly.
21. Alt + F4 is used to:
- close the active window
- select all
- open a new tab
- refresh the page
Answer: A) close the active window
Explanation: It closes the program window.
22. Deleted files can be recovered from the:
- Recycle Bin
- Task Manager
- Control Panel → Clock
- Command Prompt
Answer: A) Recycle Bin
Explanation: Unless deleted with Shift + Delete.
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