Operating Systems MCQs 2026

Time-sharing operating systems allow

1. A Only one program ever ✓
2. B No user interaction ✓
3. C Only printing ✓
4. D Multiple users to share the CPU simultaneously ✓

Disk fragmentation refers to

1. A Virus infection ✓
2. B CPU overheating ✓
3. C Scattering of file pieces across the disk ✓
4. D Screen flickering ✓

A device driver is software that

1. A Cleans the disk ✓
2. B Cools the CPU ✓
3. C Compresses files ✓
4. D Allows the OS to communicate with hardware ✓

Which company developed the iOS operating system

1. A Apple ✓
2. B Google ✓
3. C Microsoft ✓
4. D Nokia ✓

The command interpreter in an operating system is also called the

1. A Kernel ✓
2. B Shell ✓
3. C Driver ✓
4. D Loader ✓

In batch processing operating systems, jobs are

1. A Executed one word at a time ✓
2. B Run interactively ✓
3. C Grouped and processed together ✓
4. D Run in real time ✓

A signal that interrupts the normal execution of the CPU is called an

1. A Interrupt ✓
2. B Instruction ✓
3. C Increment ✓
4. D Index ✓

Which of the following is NOT a function of an operating system

1. A Memory management ✓
2. B File management ✓
3. C Process management ✓
4. D Creating spreadsheets ✓

The part of the OS that always remains in main memory is the

1. A Shell ✓
2. B Kernel ✓
3. C Compiler ✓
4. D Editor ✓

Which key combination is commonly used to warm boot a PC

1. A Alt+F4 ✓
2. B Ctrl+C ✓
3. C Ctrl+Alt+Del ✓
4. D Shift+Del ✓

A warm boot means

1. A Turning the computer on from off ✓
2. B Installing an OS ✓
3. C Formatting the disk ✓
4. D Restarting without turning off the power ✓

Running multiple programs at the same time on a single CPU is called

1. A Multitasking ✓
2. B Booting ✓
3. C Formatting ✓
4. D Spooling ✓

A real-time operating system is mainly used in

1. A Word processing ✓
2. B Web browsing ✓
3. C Industrial and embedded control systems ✓
4. D Gaming only ✓

Which of the following manages the allocation of RAM to programs

1. A Monitor ✓
2. B Operating system ✓
3. C BIOS chip ✓
4. D Keyboard ✓

The file system commonly used by modern Windows is

1. A ext4 ✓
2. B HFS ✓
3. C APFS ✓
4. D NTFS ✓

Virtual memory allows the computer to

1. A Use disk space as extra RAM ✓
2. B Increase CPU cores ✓
3. C Cool the processor ✓
4. D Speed up the monitor ✓

Which of the following is a multi-user operating system

1. A DOS ✓
2. B Unix ✓
3. C Calculator ✓
4. D Notepad ✓

Windows operating system was developed by

1. A Apple ✓
2. B IBM ✓
3. C Microsoft ✓
4. D Google ✓

Which OS uses a command line interface and typed commands

1. A DOS ✓
2. B Windows 10 ✓
3. C macOS ✓
4. D Android ✓

GUI stands for

1. A General User Interface ✓
2. B Graphical Utility Interface ✓
3. C Grouped User Interface ✓
4. D Graphical User Interface ✓

Which of the following is a modern Microsoft operating system

1. A Ubuntu ✓
2. B Fedora ✓
3. C Solaris ✓
4. D Windows 11 ✓

Paging is a technique used in

1. A CPU cooling ✓
2. B Memory management ✓
3. C Printing ✓
4. D Networking ✓

SJF scheduling stands for

1. A Simple Job First ✓
2. B System Job Function ✓
3. C Shortest Job First ✓
4. D Sequential Job Flow ✓

The first program that runs at startup and loads the OS is the

1. A Bootstrap loader ✓
2. B Compiler ✓
3. C Text editor ✓
4. D Spooler ✓

Which of the following is a disk operating system with no graphical interface

1. A Windows 7 ✓
2. B MS-DOS ✓
3. C Android ✓
4. D macOS ✓

A program in execution is called a

1. A Process ✓
2. B Thread ✓
3. C File ✓
4. D Command ✓

An operating system is an example of

1. A Application software ✓
2. B System software ✓
3. C Utility hardware ✓
4. D Firmware only ✓

Which of the following is an operating system

1. A MS Word ✓
2. B Photoshop ✓
3. C Oracle ✓
4. D Windows ✓

The core part of an operating system is called the

1. A Kernel ✓
2. B Shell ✓
3. C GUI ✓
4. D BIOS ✓

The interface between the user and the kernel is the

1. A CPU ✓
2. B BIOS ✓
3. C Shell ✓
4. D Register ✓

DOS stands for

1. A Data Operating System ✓
2. B Disk Operating System ✓
3. C Direct Operating System ✓
4. D Digital Operating System ✓

Which operating system is open source

1. A Windows ✓
2. B macOS ✓
3. C DOS ✓
4. D Linux ✓

The Linux kernel was originally developed by

1. A Linus Torvalds ✓
2. B Bill Gates ✓
3. C Steve Jobs ✓
4. D Dennis Ritchie ✓

Unix was developed at

1. A Microsoft ✓
2. B Intel ✓
3. C Bell Labs ✓
4. D Apple ✓

The Android operating system is based on which kernel

1. A Windows ✓
2. B Unix ✓
3. C DOS ✓
4. D Linux ✓

Which of these is a mobile operating system

1. A iOS ✓
2. B DOS ✓
3. C Unix ✓
4. D FAT32 ✓

The process of starting a computer is called

1. A Loading ✓
2. B Booting ✓
3. C Spooling ✓
4. D Paging ✓

A cold boot means starting the computer

1. A By pressing restart ✓
2. B From sleep mode ✓
3. C From a completely powered-off state ✓
4. D Using a CD ✓

BIOS stands for

1. A Basic Input Output System ✓
2. B Binary Input Output System ✓
3. C Basic Internal Operating System ✓
4. D Basic Integrated Output System ✓

POST performed during booting stands for

1. A Power Off Self Test ✓
2. B Program On Self Test ✓
3. C Peripheral Output Self Test ✓
4. D Power On Self Test ✓

Managing files and folders is a function of the

1. A CPU ✓
2. B Operating system ✓
3. C Monitor ✓
4. D Power supply ✓

A situation where two processes wait indefinitely for each other's resources is called

1. A Interrupt ✓
2. B Spooling ✓
3. C Deadlock ✓
4. D Paging ✓

Which scheduling algorithm assigns a fixed time slot to each process

1. A FCFS ✓
2. B SJF ✓
3. C Priority ✓
4. D Round Robin ✓

A lightweight sub-unit of a process is called a

1. A Kernel ✓
2. B Deadlock ✓
3. C Thread ✓
4. D Spool ✓

Spooling is most commonly used with

1. A Monitors ✓
2. B Printers ✓
3. C Keyboards ✓
4. D Scanners ✓