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Operating Systems MCQs 2026

45 questions with detailed answers · 21 from past papers · 5 quiz batches available

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Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1Questions 1–10 of 45
  1. Q1Past Paper · PPSC/FPSC/NTSmedium

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

    1. AShell
    2. BKernel
    3. CCompiler
    4. DEditor
    💡 Explanation:

    The kernel remains resident in main memory while the computer runs.

  2. Q2medium

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

    1. AInterrupt
    2. BInstruction
    3. CIncrement
    4. DIndex
    💡 Explanation:

    An interrupt is a signal that temporarily halts the CPU's current execution.

  3. Q3medium

    In batch processing operating systems, jobs are

    1. AExecuted one word at a time
    2. BRun interactively
    3. CGrouped and processed together
    4. DRun in real time
    💡 Explanation:

    Batch systems group similar jobs and process them together without user interaction.

  4. Q4easy

    Which of the following is a modern Microsoft operating system

    1. AUbuntu
    2. BFedora
    3. CSolaris
    4. DWindows 11
    💡 Explanation:

    Windows 11 is a modern Microsoft operating system; the others are Unix/Linux based.

  5. Q5hard

    Paging is a technique used in

    1. ACPU cooling
    2. BMemory management
    3. CPrinting
    4. DNetworking
    💡 Explanation:

    Paging is a memory-management scheme that divides memory into fixed-size pages.

  6. Q6Past Paper · PPSC/FPSC/NTSmedium

    SJF scheduling stands for

    1. ASimple Job First
    2. BSystem Job Function
    3. CShortest Job First
    4. DSequential Job Flow
    💡 Explanation:

    SJF stands for Shortest Job First scheduling.

  7. Q7Past Paper · PPSC/FPSC/NTSmedium

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

    1. ABootstrap loader
    2. BCompiler
    3. CText editor
    4. DSpooler
    💡 Explanation:

    The bootstrap loader runs first and loads the operating system into memory.

  8. Q8Past Paper · PPSC/FPSC/NTSmedium

    Time-sharing operating systems allow

    1. AOnly one program ever
    2. BNo user interaction
    3. COnly printing
    4. DMultiple users to share the CPU simultaneously
    💡 Explanation:

    Time-sharing lets many users share CPU time in rapid rotation.

  9. Q9easy

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

    1. AWindows 7
    2. BMS-DOS
    3. CAndroid
    4. DmacOS
    💡 Explanation:

    MS-DOS is a text-based disk operating system without a graphical interface.

  10. Q10medium

    Disk fragmentation refers to

    1. AVirus infection
    2. BCPU overheating
    3. CScattering of file pieces across the disk
    4. DScreen flickering
    💡 Explanation:

    Fragmentation is when parts of files are scattered across non-contiguous disk areas.

  11. Q11medium

    A device driver is software that

    1. ACleans the disk
    2. BCools the CPU
    3. CCompresses files
    4. DAllows the OS to communicate with hardware
    💡 Explanation:

    A device driver lets the operating system communicate with a specific hardware device.

  12. Q12Past Paper · PPSC/FPSC/NTSeasy

    Which company developed the iOS operating system

    1. AApple
    2. BGoogle
    3. CMicrosoft
    4. DNokia
    💡 Explanation:

    iOS was developed by Apple for its iPhone and iPad devices.

  13. Q13medium

    The command interpreter in an operating system is also called the

    1. AKernel
    2. BShell
    3. CDriver
    4. DLoader
    💡 Explanation:

    The command interpreter that reads user commands is called the shell.

  14. Q14Past Paper · PPSC/FPSC/NTSeasy

    An operating system is an example of

    1. AApplication software
    2. BSystem software
    3. CUtility hardware
    4. DFirmware only
    💡 Explanation:

    An operating system is system software that manages hardware and other programs.

  15. Q15easy

    Which of the following is an operating system

    1. AMS Word
    2. BPhotoshop
    3. COracle
    4. DWindows
    💡 Explanation:

    Windows is an operating system; the others are application software.

  16. Q16Past Paper · PPSC/FPSC/NTSmedium

    The core part of an operating system is called the

    1. AKernel
    2. BShell
    3. CGUI
    4. DBIOS
    💡 Explanation:

    The kernel is the central core of the operating system that manages resources.

  17. Q17medium

    The interface between the user and the kernel is the

    1. ACPU
    2. BBIOS
    3. CShell
    4. DRegister
    💡 Explanation:

    The shell is the interface that lets users interact with the kernel.

  18. Q18Past Paper · PPSC/FPSC/NTSeasy

    DOS stands for

    1. AData Operating System
    2. BDisk Operating System
    3. CDirect Operating System
    4. DDigital Operating System
    💡 Explanation:

    DOS stands for Disk Operating System.

  19. Q19Past Paper · PPSC/FPSC/NTSeasy

    Which operating system is open source

    1. AWindows
    2. BmacOS
    3. CDOS
    4. DLinux
    💡 Explanation:

    Linux is a free and open-source operating system.

  20. Q20Past Paper · PPSC/FPSC/NTSmedium

    The Linux kernel was originally developed by

    1. ALinus Torvalds
    2. BBill Gates
    3. CSteve Jobs
    4. DDennis Ritchie
    💡 Explanation:

    Linus Torvalds created the Linux kernel in 1991.

  21. Q21Past Paper · PPSC/FPSC/NTSmedium

    Unix was developed at

    1. AMicrosoft
    2. BIntel
    3. CBell Labs
    4. DApple
    💡 Explanation:

    Unix was developed at Bell Labs by Ken Thompson and Dennis Ritchie.

  22. Q22Past Paper · PPSC/FPSC/NTSmedium

    The Android operating system is based on which kernel

    1. AWindows
    2. BUnix
    3. CDOS
    4. DLinux
    💡 Explanation:

    Android is built on the Linux kernel.

  23. Q23easy

    Which of these is a mobile operating system

    1. AiOS
    2. BDOS
    3. CUnix
    4. DFAT32
    💡 Explanation:

    iOS is Apple's mobile operating system.

  24. Q24Past Paper · PPSC/FPSC/NTSeasy

    The process of starting a computer is called

    1. ALoading
    2. BBooting
    3. CSpooling
    4. DPaging
    💡 Explanation:

    Booting is the process of starting up a computer and loading the OS.

  25. Q25medium

    A cold boot means starting the computer

    1. ABy pressing restart
    2. BFrom sleep mode
    3. CFrom a completely powered-off state
    4. DUsing a CD
    💡 Explanation:

    A cold boot starts the computer from a fully powered-off state.

  26. Q26Past Paper · PPSC/FPSC/NTSmedium

    BIOS stands for

    1. ABasic Input Output System
    2. BBinary Input Output System
    3. CBasic Internal Operating System
    4. DBasic Integrated Output System
    💡 Explanation:

    BIOS stands for Basic Input Output System, firmware that starts the hardware.

  27. Q27Past Paper · PPSC/FPSC/NTSmedium

    POST performed during booting stands for

    1. APower Off Self Test
    2. BProgram On Self Test
    3. CPeripheral Output Self Test
    4. DPower On Self Test
    💡 Explanation:

    POST (Power On Self Test) checks hardware when the computer starts.

  28. Q28easy

    Managing files and folders is a function of the

    1. ACPU
    2. BOperating system
    3. CMonitor
    4. DPower supply
    💡 Explanation:

    File management is a core function of the operating system.

  29. Q29Past Paper · PPSC/FPSC/NTShard

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

    1. AInterrupt
    2. BSpooling
    3. CDeadlock
    4. DPaging
    💡 Explanation:

    A deadlock occurs when processes wait forever for resources held by each other.

  30. Q30Past Paper · PPSC/FPSC/NTShard

    Which scheduling algorithm assigns a fixed time slot to each process

    1. AFCFS
    2. BSJF
    3. CPriority
    4. DRound Robin
    💡 Explanation:

    Round Robin scheduling gives each process a fixed time quantum in turn.

  31. Q31medium

    A program in execution is called a

    1. AProcess
    2. BThread
    3. CFile
    4. DCommand
    💡 Explanation:

    A process is a program that is currently being executed.

  32. Q32medium

    A lightweight sub-unit of a process is called a

    1. AKernel
    2. BDeadlock
    3. CThread
    4. DSpool
    💡 Explanation:

    A thread is a lightweight unit of execution within a process.

  33. Q33medium

    Spooling is most commonly used with

    1. AMonitors
    2. BPrinters
    3. CKeyboards
    4. DScanners
    💡 Explanation:

    Spooling queues jobs, most commonly for printers.

  34. Q34Past Paper · PPSC/FPSC/NTSeasy

    GUI stands for

    1. AGeneral User Interface
    2. BGraphical Utility Interface
    3. CGrouped User Interface
    4. DGraphical User Interface
    💡 Explanation:

    GUI stands for Graphical User Interface, using icons and windows.

  35. Q35easy

    Which OS uses a command line interface and typed commands

    1. ADOS
    2. BWindows 10
    3. CmacOS
    4. DAndroid
    💡 Explanation:

    MS-DOS uses a command line interface requiring typed commands.

  36. Q36Past Paper · PPSC/FPSC/NTSeasy

    Windows operating system was developed by

    1. AApple
    2. BIBM
    3. CMicrosoft
    4. DGoogle
    💡 Explanation:

    Microsoft developed the Windows operating system.

  37. Q37Past Paper · PPSC/FPSC/NTSmedium

    Which of the following is a multi-user operating system

    1. ADOS
    2. BUnix
    3. CCalculator
    4. DNotepad
    💡 Explanation:

    Unix is a multi-user, multitasking operating system.

  38. Q38medium

    Virtual memory allows the computer to

    1. AUse disk space as extra RAM
    2. BIncrease CPU cores
    3. CCool the processor
    4. DSpeed up the monitor
    💡 Explanation:

    Virtual memory uses disk space to act as an extension of RAM.

  39. Q39medium

    The file system commonly used by modern Windows is

    1. Aext4
    2. BHFS
    3. CAPFS
    4. DNTFS
    💡 Explanation:

    Modern Windows uses the NTFS file system.

  40. Q40easy

    Which of the following manages the allocation of RAM to programs

    1. AMonitor
    2. BOperating system
    3. CBIOS chip
    4. DKeyboard
    💡 Explanation:

    Memory management, including RAM allocation, is handled by the operating system.

  41. Q41medium

    A real-time operating system is mainly used in

    1. AWord processing
    2. BWeb browsing
    3. CIndustrial and embedded control systems
    4. DGaming only
    💡 Explanation:

    Real-time operating systems are used where immediate response is critical, such as industrial control.

  42. Q42Past Paper · PPSC/FPSC/NTSeasy

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

    1. AMultitasking
    2. BBooting
    3. CFormatting
    4. DSpooling
    💡 Explanation:

    Multitasking lets a single CPU run several programs seemingly at once.

  43. Q43medium

    A warm boot means

    1. ATurning the computer on from off
    2. BInstalling an OS
    3. CFormatting the disk
    4. DRestarting without turning off the power
    💡 Explanation:

    A warm boot restarts the computer without removing power.

  44. Q44easy

    Which key combination is commonly used to warm boot a PC

    1. AAlt+F4
    2. BCtrl+C
    3. CCtrl+Alt+Del
    4. DShift+Del
    💡 Explanation:

    Ctrl+Alt+Del is traditionally used to restart or interrupt a PC.

  45. Q45easy

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

    1. AMemory management
    2. BFile management
    3. CProcess management
    4. DCreating spreadsheets
    💡 Explanation:

    Creating spreadsheets is an application task, not an OS function.

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