Operating Systems MCQs

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Operating Systems MCQs

Practice Operating System MCQs covering Windows, Linux, Android, booting, multitasking and multiprocessing concepts with answers and explanations.

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Total Questions

Practice Questions

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Question #41
Which of the following options represents a core feature of asymmetric multiprocessing (AMP)?
A. Memory is physically isolated and cannot be read by any processor core.
B. A master processor schedules tasks and distributes distinct workloads to specific slave processors.
C. All processors have completely equal priority and share all resources.
D. No two processors can be active inside the motherboard enclosure at the same time.
Discuss
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Correct Answer: Option B

Explanation:
In Asymmetric Multiprocessing (AMP), there is a master-slave structure where a single master controller processor manages system resources and schedules tasks for subordinate processors.
This question belongs to: Computer Operating Systems
Question #42
Which Windows component provides a comprehensive view of active processes, performance metrics, and network utilization, allowing users to terminate frozen apps?
A. Disk Management
B. Event Viewer
C. Device Manager
D. Task Manager
Discuss
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Correct Answer: Option D

Explanation:
Windows Task Manager provides real-time information about system performance, application memory footprints, and allows terminating running processes.
This question belongs to: Computer Operating Systems
Question #43
What does the term 'Spooling' stand for in the context of system operations?
A. Simultaneous Peripheral Operations On-Line
B. Storage Process Organization Layout
C. Sequential Process Optimization Line
D. System Peripheral Output Link
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Correct Answer: Option A

Explanation:
SPOOLING stands for Simultaneous Peripheral Operations On-Line. It is a technique used to buffer data intended for slow peripheral devices like printers.
This question belongs to: Computer Operating Systems
Question #44
In Linux, which command is used to display the contents of a text file directly onto the terminal screen?
A. cp
B. cat
C. ls
D. cd
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Correct Answer: Option B

Explanation:
The 'cat' (concatenate) command is used to read and display file contents directly onto the standard output terminal screen.
This question belongs to: Computer Operating Systems
Question #45
Which of the following processes is the first user-space process started by the Linux kernel during system initialization, typically having a Process ID (PID) of 1?
A. init (or systemd)
B. kthreadd
C. cron
D. bash
Discuss
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Correct Answer: Option A

Explanation:
The 'init' process (modern distributions use systemd) is the very first process launched by the Linux kernel during boot, and it receives PID 1.
This question belongs to: Computer Operating Systems
Question #46
What is the purpose of a 'System Call' in an operating system environment?
A. To provide a programmatic interface for user applications to request privileged services from the kernel.
B. To let a remote computer access the local area network configuration.
C. To clean up invalid registry keys from secondary storage hardware.
D. To dial a toll-free technical support number automatically.
Discuss
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Correct Answer: Option A

Explanation:
System calls act as the fundamental interface between a running application program and the privileged actions performed by the operating system kernel.
This question belongs to: Computer Operating Systems
Question #47
Which of the following application file formats is natively used to distribute and install apps on the Android operating system?
A. .msi
B. .exe
C. .deb
D. .apk
Discuss
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Correct Answer: Option D

Explanation:
Android packages use the '.apk' (Android Package Kit) file extension to bundle application code, resources, and assets for easy installation.
This question belongs to: Computer Operating Systems
Question #48
What does the 'GUI' acronym stand for in computer interface terminology?
A. Global User Interconnect
B. Graphical User Interface
C. Graphical Utility Interface
D. General User Integration
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Correct Answer: Option B

Explanation:
GUI stands for Graphical User Interface. It allows users to interact with electronic devices through visual icons and auditory indicators.
This question belongs to: Computer Operating Systems
Question #49
Which process state defines a task that is currently waiting in line to be assigned to a CPU core by the operating system scheduler?
A. Blocked
B. Ready
C. Terminated
D. Running
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Correct Answer: Option B

Explanation:
A process is in the 'Ready' state when it is prepared for execution and is waiting to be allocated a time slice on a processor core.
This question belongs to: Computer Operating Systems
Question #50
In Windows, what is the maximum file size limit supported natively by the older FAT32 file system?
A. 4 GB
B. 16 GB
C. 2 GB
D. unlimited
Discuss
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Correct Answer: Option A

Explanation:
The FAT32 file system carries a strict architectural limitation where single individual files cannot exceed 4 GB in size.
This question belongs to: Computer Operating Systems
Question #51
Which scheduling algorithm uses a fixed time slice called a 'quantum' to cycle through all ready processes in a circular fashion?
A. Shortest Remaining Time First (SRTF)
B. Non-preemptive Priority
C. Round Robin (RR)
D. First-In, First-Out (FIFO)
Discuss
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Correct Answer: Option C

Explanation:
Round Robin (RR) is a preemptive scheduling algorithm that assigns each process a small fixed time quantum sequentially in a cyclic loop.
This question belongs to: Computer Operating Systems
Question #52
What is the name of the central management module in Windows that controls hardware configuration and manages device updates or rollbacks?
A. System Configuration
B. Task Scheduler
C. Disk Management
D. Device Manager
Discuss
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Correct Answer: Option D

Explanation:
Device Manager is a Control Panel applet in Windows that allows users to view and control the hardware attached to the computer.
This question belongs to: Computer Operating Systems
Question #53
Which Linux command is used to delete a file from the file system permanently?
A. rm
B. remove
C. del
D. mv
Discuss
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Correct Answer: Option A

Explanation:
The 'rm' command stands for remove and is used to delete files or directories in Unix-like terminal shells.
This question belongs to: Computer Operating Systems
Question #54
What is the function of the 'Zygote' process in the Android operating system architecture?
A. It is a base process that pre-loads common system classes to quickly fork new application processes.
B. It translates Dalvik bytecode into machine code at runtime.
C. It provides secure sandboxing for financial applications exclusively.
D. It handles battery optimization functions for background hardware.
Discuss
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Correct Answer: Option A

Explanation:
Zygote is a special master process in Android that starts during system boot. It pre-loads framework resources and forks itself to instantiate new applications rapidly.
This question belongs to: Computer Operating Systems
Question #55
Which of the following terms describes a tiny, lightweight execution unit within a larger process that shares the parent process's memory space?
A. Daemon
B. Sect
C. Kernel Core
D. Thread
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Correct Answer: Option D

Explanation:
A thread is a basic unit of CPU utilization. Multiple threads within the same process share code, data, and OS resources like open files.
This question belongs to: Computer Operating Systems
Question #56
What type of operating system kernel includes all device drivers, file system handlers, and process management routines inside a single massive binary space running in privileged mode?
A. Asymmetric Kernel
B. Microkernel
C. Exokernel
D. Monolithic Kernel
Discuss
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Correct Answer: Option D

Explanation:
A monolithic kernel compiles all essential OS services directly into a single, comprehensive space, providing high performance at the expense of modular isolation.
This question belongs to: Computer Operating Systems
Question #57
Which Windows keyboard shortcut opens the Advanced Windows Power User Task Menu (providing direct access to Device Manager, Disk Management, and Terminal)?
A. Windows Key + X
B. Ctrl + Alt + Delete
C. Alt + Spacebar
D. Windows Key + L
Discuss
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Correct Answer: Option A

Explanation:
Pressing Windows Key + X brings up the Quick Link / Power User menu, giving swift administrative shortcuts to advanced Windows tools.
This question belongs to: Computer Operating Systems
Question #58
In an operating system, what is the primary role of the 'Short-Term Scheduler'?
A. To back up system configuration files to the cloud.
B. To select from among the processes in the ready queue and allocate the CPU to one of them.
C. To select which process should be brought from secondary storage into the main memory.
D. To switch between light and dark visual themes.
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Correct Answer: Option B

Explanation:
The short-term scheduler (or CPU scheduler) picks which process from the ready queue gets executed by the CPU next.
This question belongs to: Computer Operating Systems
Question #59
Which component of the Linux operating system translates user terminal text commands directly into specific actions understood by the kernel?
A. Shell
B. GUI Desktop
C. Compiler
D. BIOS
Discuss
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Correct Answer: Option A

Explanation:
The shell is a specialized command-line interpreter program that accepts text inputs from the user and executes system commands via the kernel.
This question belongs to: Computer Operating Systems
Question #60
What is the purpose of the 'chkdsk' utility command in a Microsoft Windows environment?
A. To update the motherboard BIOS firmware to the latest version.
B. To clean up browser history and cookies from the main storage.
C. To monitor internet data usage.
D. To scan and repair structural file system errors and bad sectors on a storage volume.
Discuss
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Correct Answer: Option D

Explanation:
The CHKDSK (Check Disk) utility inspects file systems and hard drives for physical or logical integrity issues and repairs them.
This question belongs to: Computer Operating Systems

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