1. In a time-sharing OS the CPU time is divided into small units called:
- packets
- sectors
- time slices (quantum)
- pixels
Answer: C) time slices (quantum)
Explanation: Each user/process gets a short slice in turn.
MCQs / Computer Science / Types of Operating Systems and File Management
Types of Operating Systems and File Management MCQs — Computer Science
39 multiple-choice questions on Types of Operating Systems and File Management 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. The time between submitting a job and receiving its output is called:
- seek time
- boot time
- turnaround time
- refresh rate
Answer: C) turnaround time
Explanation: Batch systems have long turnaround times.
3. A named collection of related data stored on disk is a:
- path
- folder
- drive
- file
Answer: D) file
Explanation: Files hold documents, pictures, programs etc.
4. Which shortcut deletes a file permanently without sending it to the Recycle Bin?
- Delete only
- Shift + Delete
- Ctrl + Delete
- Alt + Delete
Answer: B) Shift + Delete
Explanation: Shift + Delete bypasses the Recycle Bin.
5. VxWorks and FreeRTOS are examples of:
- real-time operating systems
- batch OS only
- spreadsheets
- web browsers
Answer: A) real-time operating systems
Explanation: They are used in embedded systems.
6. Time-sharing allows:
- many users to interact with one computer at the same time
- deadline-based control of machines only
- only one job without interaction
- computers to work without memory
Answer: A) many users to interact with one computer at the same time
Explanation: Fast switching gives each user quick response.
7. In a batch processing OS, jobs are:
- shared in small time slices among users
- processed instantly as they arrive
- grouped and executed without user interaction
- controlled by sensors with deadlines
Answer: C) grouped and executed without user interaction
Explanation: Jobs with similar needs are run as a batch.
8. Which is an advantage of a GUI?
- It works without any graphics hardware
- It is fastest for all expert tasks
- It is easy to learn without memorising commands
- It uses very little memory
Answer: C) It is easy to learn without memorising commands
Explanation: Icons and menus make it user-friendly.
9. The keyboard shortcut to rename a selected file in Windows is:
- Ctrl + R
- F5
- F2
- Alt + F4
Answer: C) F2
Explanation: F2 makes the name editable.
10. Which scan checks the entire computer?
- Quick scan
- Full scan
- Boot scan only of the keyboard
- Custom scan of one folder
Answer: B) Full scan
Explanation: A full scan checks all files and programs.
11. The shortcut to create a new folder in File Explorer is:
- Ctrl + N only
- Alt + F
- Ctrl + F
- Ctrl + Shift + N
Answer: D) Ctrl + Shift + N
Explanation: Ctrl + Shift + N creates a new folder.
12. Windows Defender keeps itself updated with:
- new hardware
- printer drivers
- security intelligence (virus definition) updates
- BIOS passwords
Answer: C) security intelligence (virus definition) updates
Explanation: New definitions help detect new threats.
13. Which is a suitable example of batch processing?
- Airbag control
- Online gaming
- ATM withdrawal
- Monthly payroll
Answer: D) Monthly payroll
Explanation: Payroll is processed periodically in bulk.
14. Opening several programs in separate windows at the same time is possible because GUI supports:
- multitasking
- batch processing
- compilation
- booting
Answer: A) multitasking
Explanation: Each program appears in its own window.
15. Giving each process a turn of the CPU in a circular order is called:
- round-robin scheduling
- batch sorting
- spooling
- striping
Answer: A) round-robin scheduling
Explanation: Round-robin is typical in time-sharing.
16. A major disadvantage of batch OS is:
- it needs sensors
- too much user interaction
- long turnaround time and no interaction
- very fast response
Answer: C) long turnaround time and no interaction
Explanation: Users wait until the whole batch is processed.
17. Which application needs a hard real-time OS?
- Car airbag system
- Word processing
- Email reading
- Monthly bill printing
Answer: A) Car airbag system
Explanation: The airbag must inflate within milliseconds.
18. An operating system that must respond within a strict time limit is a:
- batch operating system
- time-sharing operating system only
- real-time operating system
- menu-driven OS
Answer: C) real-time operating system
Explanation: RTOS guarantees response within deadlines.
19. In a real-time system, a correct result produced too late is:
- stored for batch processing
- considered a failure
- better than a fast result
- always acceptable
Answer: B) considered a failure
Explanation: Timing is part of correctness.
20. Windows Defender (Microsoft Defender Antivirus) is:
- a web browser
- a word processor
- built-in antivirus software in Windows
- a hardware device
Answer: C) built-in antivirus software in Windows
Explanation: It protects against malware.
21. The Windows program used to browse and manage files is:
- Paint
- Task Manager
- File Explorer
- Notepad
Answer: C) File Explorer
Explanation: Open it with Windows key + E.
22. Which character is NOT allowed in a Windows file name?
- ?
- -
- a space
Answer: B) ?
Explanation: / : ? " < are not allowed.
23. Folders within folders form a:
- ring topology
- hierarchical (tree) structure
- batch
- RAID array
Answer: B) hierarchical (tree) structure
Explanation: Directories are arranged like an upside-down tree.
24. UNIX is an example of a:
- menu-driven ATM system
- time-sharing, multi-user operating system
- batch-only operating system
- hard real-time system for airbags
Answer: B) time-sharing, multi-user operating system
Explanation: UNIX was designed for time-sharing.
25. To move a file you can use:
- Copy (Ctrl + C) only
- Undo (Ctrl + Z)
- Cut (Ctrl + X) and Paste (Ctrl + V)
- Print (Ctrl + P)
Answer: C) Cut (Ctrl + X) and Paste (Ctrl + V)
Explanation: Cut removes it from the original place when pasted.
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