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Operating Systems MCQs with Answers & Key Concepts MCQs

Operating Systems covers the basic concepts, functions and types of operating systems, including Windows, Linux, Unix, macOS, Android and real-time systems. It includes process management, memory management, file systems, scheduling, security, device management, commands and system software concepts. This topic is useful for Computer & IT preparation in CSS, PMS, PPSC, FPSC and other competitive exams through exam-focused MCQs and explanations.

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Operating Systems MCQs with Answers & Key Concepts

Operating Systems MCQs with Answers & Key Concepts MCQs With Answers

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CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: temporarily stores copied or cut data?
A. Multiprocessing
B. Main memory management
C. Clipboard
D. Task Manager
Read Theory
Correct Answer: C
Clipboard: temporarily stores copied or cut data.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: temporarily stores many deleted files so they can be restored before permanent removal?
A. Recycle Bin
B. Thread
C. Disk Management
D. NTFS
Read Theory
Correct Answer: A
Recycle Bin: temporarily stores many deleted files so they can be restored before permanent removal.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: is a hierarchical Windows database for system and application configuration settings?
A. Context switch
B. Defragmentation
C. Registry
D. Priority scheduling
Read Theory
Correct Answer: C
Registry: is a hierarchical Windows database for system and application configuration settings.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: provides the modern Windows interface for configuring system options?
A. system call
B. Settings
C. mkdir
D. Swap space
Read Theory
Correct Answer: B
Settings: provides the modern Windows interface for configuring system options.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: provides traditional Windows configuration applets?
A. Defragmentation
B. Control Panel
C. Minimize
D. Disk Management
Read Theory
Correct Answer: B
Control Panel: provides traditional Windows configuration applets.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: displays Windows system, application, and security event logs?
A. Clipboard
B. DMA
C. UEFI
D. Event Viewer
Read Theory
Correct Answer: D
Event Viewer: displays Windows system, application, and security event logs.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: creates, deletes, formats, and manages disks, partitions, and volumes on Windows?
A. Mobile OS
B. Restore point
C. Authorization
D. Disk Management
Read Theory
Correct Answer: D
Disk Management: creates, deletes, formats, and manages disks, partitions, and volumes on Windows.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: shows installed hardware devices and their drivers on Windows?
A. File extension
B. Device Manager
C. Kernel mode
D. Relative path
Read Theory
Correct Answer: B
Device Manager: shows installed hardware devices and their drivers on Windows.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: shows running processes, performance, startup items, and other system information on Windows?
A. Task Manager
B. Multiprocessing
C. mv
D. Scheduler
Read Theory
Correct Answer: A
Task Manager: shows running processes, performance, startup items, and other system information on Windows.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: allows an OS to tell an SSD which blocks are no longer in use so the SSD can manage them efficiently?
A. Multithreading
B. del
C. TRIM
D. rmdir
Read Theory
Correct Answer: C
TRIM: allows an OS to tell an SSD which blocks are no longer in use so the SSD can manage them efficiently.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: reorganizes fragmented data on rotational disks to reduce seek overhead?
A. Defragmentation
B. Event Viewer
C. Preemptive scheduling
D. Authorization
Read Theory
Correct Answer: A
Defragmentation: reorganizes fragmented data on rotational disks to reduce seek overhead.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: removes selected temporary and unnecessary files to free storage space?
A. ext4
B. Multiuser OS
C. Disk Cleanup
D. Bootloader
Read Theory
Correct Answer: C
Disk Cleanup: removes selected temporary and unnecessary files to free storage space.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: records selected system configuration/state information for recovery on Windows?
A. Plug and Play
B. Time sharing
C. Restore point
D. CLI
Read Theory
Correct Answer: C
Restore point: records selected system configuration/state information for recovery on Windows.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: creates a separate copy of data for recovery?
A. PowerShell
B. Device driver
C. Backup
D. Hibernate
Read Theory
Correct Answer: C
Backup: creates a separate copy of data for recovery.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: protects data by transforming it into unreadable ciphertext without the appropriate key?
A. pwd
B. File system
C. Firewall
D. Encryption
Read Theory
Correct Answer: D
Encryption: protects data by transforming it into unreadable ciphertext without the appropriate key.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: detects and removes or quarantines malicious software?
A. Antivirus
B. UEFI
C. Firewall
D. Page replacement
Read Theory
Correct Answer: A
Antivirus: detects and removes or quarantines malicious software.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: filters network traffic according to security rules?
A. Firewall
B. rm
C. Recycle Bin
D. Directory
Read Theory
Correct Answer: A
Firewall: filters network traffic according to security rules.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: prompts or controls elevation of administrative privileges on Windows?
A. Process
B. Thrashing
C. Aging
D. UAC
Read Theory
Correct Answer: D
UAC: prompts or controls elevation of administrative privileges on Windows.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: determines what an authenticated identity may do?
A. copy
B. Window
C. Permission
D. Authorization
Read Theory
Correct Answer: D
Authorization: determines what an authenticated identity may do.
CSS - PMS - CCE - PCS - Basic Computing Operating Systems
Which operating-system term best matches this description: verifies a user's or system's identity?
A. User mode
B. Authentication
C. Program
D. Kernel
Read Theory
Correct Answer: B
Authentication: verifies a user's or system's identity.
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