Topic MCQs · Computer Science
70 MCQs on Operating Systems sit in the GK360 bank, collected from 44 solved papers (2019–2026). Below are the top 65 distinct questions — repeats across papers merged into their strongest version — with the correct answer marked, an explanation where the bank carries one, and the source paper named on every card.
Correct Answer: Operating system allows more than one program to run Concurrently
The correct answer is Operating system allows more than one program to run Concurrently, as asked in this question on Operating Systems.
From: Assistant Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Google
Google acquired Android Inc. in 2005 and has since developed and maintained the Android mobile operating system.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Linux
Linux is a family of open-source Unix-like operating systems, contrasting with proprietary systems like Windows and macOS.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Operating system
An operating system is essential for hardware management and for loading other programs into memory upon startup.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: File extension
Operating systems use file extensions to identify the file format and determine which application should open the file.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Kernel
The kernel is the central component of an operating system that manages hardware resources and interfaces directly with the hardware.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Fork
The fork() system call in Unix/Linux is used to create a new process by duplicating the existing (parent) process.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Processes wait indefinitely
A deadlock occurs when two or more processes are waiting for each other to release resources, resulting in a state where none can proceed.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: All of these
Windows 10 allows users to back up data to various locations including external USB drives, cloud services like OneDrive, or network locations.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Operating system
macOS is the proprietary operating system developed by Apple for its Mac line of computers.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Recovery
Checkpoints allow an operating system or database to restore state and continue from a known good configuration after a failure.
From: PPSC Computer Operator Past Paper 2026 Solved (2026) · PPSC
Correct Answer: Interrupt Service Routine
In computing, an Interrupt Service Routine (ISR) is a callback function that handles interrupts sent to the processor.
From: PPSC Computer Operator (BS-15) Commissioner Office Past Paper 2025 (2025) · PPSC
Correct Answer: Recycle Bin
In Windows, deleted files are moved to the Recycle Bin, where they can be restored or permanently deleted.
From: PPSC Computer Operator (BS-15) Commissioner Office Past Paper 2025 (2025) · PPSC
Correct Answer: PCB queue
In operating systems, Process Control Block (PCB) is a data structure used to store information about a process, while Ready, Job, and Device queues are actual structures for process scheduling.
From: PPSC Evaluation Officer Social Welfare Past Paper 2025 Solved (2025) · PPSC
Correct Answer: Linux
Linux is a well-known open-source operating system, meaning its source code is freely available for anyone to modify and distribute.
From: PPSC General Knowledge and Subject Specific Past Paper 2025 Solved (2025) · PPSC
Correct Answer: Linus Torvalds
Linus Torvalds, a Finnish-American software engineer, created and first released the Linux kernel in 1991.
From: PPSC Assistant S&GAD Past Paper 2024 Solved (2024) · PPSC
Correct Answer: Operating system
The operating system manages file systems, including storage, organization, and retrieval of files.
From: PPSC Corporal (BS-11) Counter Terrorism Department Punjab Police Past Paper 2024 (2024) · PPSC
Correct Answer: Both hardware and software level
Process synchronization methods exist at both hardware and software levels to prevent race conditions.
From: PPSC Inspector Cooperative Societies Past Paper 2024 Solved (2024) · PPSC
Correct Answer: To make the most efficient use of the computer hardware.
The fundamental goal of an operating system is to manage hardware resources efficiently to support application programs.
From: PPSC Intelligence Officer and Assistant Past Paper 2024 Solved (2024) · PPSC
Correct Answer: Increases
Larger page sizes lead to increased internal fragmentation because more memory space is wasted within the last page of a process.
From: PPSC Intelligence Officer and Assistant Past Paper 2024 Solved (2024) · PPSC
Correct Answer: Microsoft Corporation
Microsoft Windows is an operating system developed by Microsoft Corporation.
From: PPSC Intelligence Officer and Assistant Past Paper 2024 Solved (2024) · PPSC
Correct Answer: None of these
Deleted files are typically moved to the 'Recycle Bin' (on Windows) or 'Trash' (on macOS) before permanent removal.
From: PPSC Labour Officer and Inspector Past Paper 2024 Solved (2024) · PPSC
Correct Answer: A multiuser, multitasking operating system
Unix is a powerful, proprietary multiuser and multitasking operating system originally developed in the 1970s at Bell Labs, serving as the basis for Linux and macOS.
From: PPSC Tehsildar & Consolidation Officer Board of Revenue Past Paper 2024 Solved (2024) · PPSC
Correct Answer: MS Access
Microsoft Access is a proprietary database management system that does not have an official native application port for Linux operating systems.
From: PPSC Assistant Director Labour Welfare Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Pcb queue
Operating systems use Job queues, Ready queues, and Device queues, but a PCB (Process Control Block) is a data structure, not a queue itself.
From: PPSC District Zakat Officer BS-17 Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Windows 9
There was no commercial release of 'Windows 9'; Microsoft skipped directly from Windows 8.1 to Windows 10.
From: PPSC Junior Clerk Board of Revenue Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Command Line Interface
MS-DOS operates entirely on a Command Line Interface (CLI), where users must type text-based commands to navigate and execute programs.
From: PPSC Junior Computer Operator (BS-12) Past Paper 2023 Solved (2023) · PPSC
Correct Answer: MS-DOS
MS-DOS is a classic single-tasking, single-user operating system designed originally for IBM PC compatible personal computers.
From: PPSC Junior Computer Operator (BS-12) Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Operating system
An Operating System (OS) is the primary software that manages computer hardware resources and provides common services for software applications.
From: PPSC Junior Computer Operator (BS-12) Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Booting
Booting is the initial set of operations that a computer system performs when electrical power to the CPU is switched on.
From: PPSC Junior Computer Operator (BS-12) Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Control Panel
In Windows operating systems, the Date and Time settings module is traditionally found within the central Control Panel.
From: PPSC Junior Computer Operator (BS-12) Past Paper 2023 Solved (2023) · PPSC
Correct Answer: Minimize
Minimizing a window temporarily hides it from the screen and places it as an icon on the taskbar.
From: PPSC Assistant and Multiple Posts Past Paper 2022 Solved (2022) · PPSC
Correct Answer: Real Time System
A Real-Time Operating System (RTOS) guarantees processing events and rendering results within a strict, predefined time constraint.
From: PPSC Assistant Director Processing Agriculture Department Past Paper 2022 Solved (2022) · PPSC
Correct Answer: None of these
Linux, macOS, and modern Windows are all multi-user operating systems. An example of a true single-user system is MS-DOS.
From: PPSC Assistant (BS-16) Disaster Management Department (Board of Revenue) Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Recycle Bin
On Windows systems, deleted files are temporarily stored in the Recycle Bin before permanent deletion.
From: PPSC Assistant Board of Revenue Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Recycle Bin
In Windows operating systems, files deleted through standard methods are temporarily stored in the Recycle Bin before being permanently erased.
From: PPSC Assistant Director Administration Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Disk Operating System
DOS is an acronym that stands for Disk Operating System, widely used in early personal computers.
From: PPSC Assistant Director Administration Past Paper 2021 Solved (2021) · PPSC
Correct Answer: My documents
'My Documents' is a system folder for user files, while 'Display' and 'Date and time' are configuration applets within the Control Panel.
From: PPSC Assistant Women Development Department Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Operating System
Windows 8 and Windows 10 are GUI-based operating systems developed by Microsoft.
From: PPSC Head Clerk and Assistant HUD & PHED Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Operating system
During the booting process, the BIOS/UEFI searches for an Operating System to load into RAM; without it, the computer cannot function.
From: PPSC Head Clerk and Assistant HUD & PHED Past Paper 2021 Solved (2021) · PPSC
Correct Answer: DOS
MS-DOS (Disk Operating System) is a single-tasking, single-user command-line operating system.
From: PPSC Junior Clerk (BS-11) Board of Revenue Past Paper 2021 Solved (2021) · PPSC
Correct Answer: Operating system
macOS is a proprietary graphical operating system developed and marketed by Apple Inc.
From: PPSC Assistant Agriculture Department Water Management Wing Past Paper 2020 Solved (2020) · PPSC
Correct Answer: File Allocation Table (FAT)
The File Allocation Table (FAT) is a map of where files are stored. If a virus corrupts it, the OS cannot locate or retrieve data on the disk.
From: PPSC Assistant Anti-Corruption Establishment Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Apple
macOS (previously Mac OS X) is a proprietary graphical operating system developed and marketed by Apple Inc.
From: PPSC Assistant Anti-Corruption Establishment Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Both A & B
Unix was originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson and Dennis Ritchie.
From: PPSC Assistant Anti-Corruption Establishment Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Oracle
Oracle is primarily a database management system, whereas Windows, Linux, and DOS are operating systems.
From: PPSC Assistant BS-16 Finance Department Past Paper 2020 Solved (2020) · PPSC
Correct Answer: DOS
DOS (Disk Operating System) is a single-tasking, single-user operating system, unlike Windows or Linux.
From: PPSC Assistant Director (BS-17) S&GAD Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Windows 8
Microsoft famously removed the traditional Start button from the taskbar in the initial release of Windows 8, replacing it with a full-screen Start screen.
From: PPSC Assistant Police Department Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Recycle Bin
The Recycle Bin is a standard desktop shortcut and system folder, unlike Weather, Calendar, or News which are widgets/gadgets.
From: PPSC Assistant Sub Inspector (ASI) Anti-Corruption Past Paper 2020 Solved (2020) · PPSC
Correct Answer: File Allocation Table (FAT)
The FAT maps out exactly where all files are stored on a disk. If it is corrupted, the OS loses track of the data locations.
From: PPSC Data Entry Operator Punjab Police Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Real time operating system
A Real-Time Operating System (RTOS) guarantees a certain capability within a specified time constraint to ensure immediate processing.
From: PPSC Service Centre Officials (PLRA) Past Paper 2020 Solved (2020) · PPSC
Correct Answer: Recycle Bin
When you delete a file in Windows, it is temporarily stored in the Recycle Bin until permanently erased.
From: PPSC Assistant Director Planning (BS-17) Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Start Menu
The Start Menu in Windows provides the primary interface to access power options, including shutting down the computer.
From: PPSC Assistant Director Planning (BS-17) Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Apple Inc
macOS is the proprietary operating system developed and marketed by Apple Inc. for their Mac computer lineup.
From: PPSC Assistant S&GAD Past Paper 2019 Solved (2019) · PPSC
Correct Answer: File
A file is a common storage unit in a computer system designed to hold data such as documents, photos, or music.
From: PPSC Assistant Sub-Inspector (ASI) Punjab Police Past Paper 2019 Solved (2019) · PPSC
Correct Answer: An Operating System
Linux is a family of open-source Unix-like operating systems based on the Linux kernel.
From: PPSC Caretaker (BS-16) Lahore High Court Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Windows 2000
Windows 2000 is a major release of the Windows NT operating system developed by Microsoft.
From: PPSC Deputy Accountant (BS-16) Finance Department Past Paper 2019 (Paper 2) Solved (2019) · PPSC
Correct Answer: Windows 95
'My Computer' was first introduced in Windows 95 to serve as a user-friendly interface for browsing files and folders.
From: PPSC Elementary School Educator General (BS-14) Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Control Panel
The Control Panel (specifically the 'Date and Time' applet) allows users to configure the system clock and timezone settings.
From: PPSC Elementary School Educator General (BS-14) Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Authentication
After the OS kernel and GUI components load, the authentication program (like the login screen) runs first to verify user credentials.
From: PPSC ESE (General) (BS-14) Labour Department Past Paper 2019 Solved (2019) · PPSC
Correct Answer: An operating system
Linux is a free, open-source Unix-like operating system kernel that serves as the foundation for various OS distributions like Ubuntu and CentOS.
From: PPSC Junior Clerk S&GAD Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Operating System
Linux is a family of open-source Unix-like operating systems based on the Linux kernel.
From: PPSC Sub Inspector (Open Merit) Punjab Police Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Graphical User Interface
GUI stands for Graphical User Interface, a system of interactive visual components for computer software.
From: PPSC Sub Inspector (Open Merit) Punjab Police Past Paper 2019 Solved (2019) · PPSC
Correct Answer: ScanDisk
ScanDisk (or CHKDSK) is the utility used to scan a disk for logical and physical errors. Disk Defragmenter is used to reorganize fragmented files.
From: PPSC Sub Inspector (Open Merit) Punjab Police Past Paper 2019 Solved (2019) · PPSC
Correct Answer: Utility program
It is a built-in system utility in Windows used to manage installed software applications.
From: PPSC Sub Inspector (Service Quota) Punjab Police Past Paper 2019 Solved (2019) · PPSC
The bank holds 70 questions tagged "Operating Systems" under Computer Science, drawn from 44 solved papers (2019–2026). After merging the same question asked in multiple papers, 65 are distinct; this page shows the top 65.
They are pulled from the solved papers in the GK360 archive — PPSC papers among them — and every card on this page names its source paper and year, so you can open the full paper from the Past Papers archive.
Yes — 65 of the 65 questions shown carry a written explanation under the answer; the rest show the verified correct answer for revision. Every answer passed GK360's three-way check (printed key, worked material, standard fact).
Work through the questions on this page first, note the ones you miss, then attempt the same topic under a timer with the "Practice this topic" button above — it starts a timed Quiz Builder attempt on this exact subject and topic right away.
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