Operating Systems MCQs
Practice Operating System MCQs covering Windows, Linux, Android, booting, multitasking and multiprocessing concepts with answers and explanations.
Question #11
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Which of the following is the official default file system used by most modern distributions of Linux?
Correct Answer: Option B
Explanation:
The Fourth Extended File System (ext4) is the current standard, highly reliable file system used by default across major Linux distributions.
The Fourth Extended File System (ext4) is the current standard, highly reliable file system used by default across major Linux distributions.
This question belongs to:
Computer
Operating Systems
Question #12
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What is the name of the software layer in Android that provides standard interfaces to expose device hardware capabilities to the higher-level Java API framework?
Correct Answer: Option B
Explanation:
The Hardware Abstraction Layer (HAL) defines a standard interface for hardware vendors to implement, enabling higher-level Android framework APIs to interact with hardware.
The Hardware Abstraction Layer (HAL) defines a standard interface for hardware vendors to implement, enabling higher-level Android framework APIs to interact with hardware.
This question belongs to:
Computer
Operating Systems
Question #13
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What process occurs during a 'Warm Boot' of a computer system?
Correct Answer: Option B
Explanation:
A warm boot (rebooting) occurs when a computer is already running and is restarted using system options or keys without interrupting the electrical power supply.
A warm boot (rebooting) occurs when a computer is already running and is restarted using system options or keys without interrupting the electrical power supply.
This question belongs to:
Computer
Operating Systems
Question #14
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Which scheduling algorithm assigns the CPU to processes strictly in the exact order they arrive in the ready queue?
Correct Answer: Option D
Explanation:
First-Come, First-Served (FCFS) is a non-preemptive scheduling policy where the process that requests the CPU first receives it first.
First-Come, First-Served (FCFS) is a non-preemptive scheduling policy where the process that requests the CPU first receives it first.
This question belongs to:
Computer
Operating Systems
Question #15
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What is the name of the main repository of configuration settings, system preferences, and user options in Microsoft Windows?
Correct Answer: Option A
Explanation:
The Windows Registry is a centralized, hierarchical database used by Microsoft Windows to store low-level settings for the OS and applications.
The Windows Registry is a centralized, hierarchical database used by Microsoft Windows to store low-level settings for the OS and applications.
This question belongs to:
Computer
Operating Systems
Question #16
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Which mechanism allows an operating system to simulate more memory than the computer physically contains by transferring data temporarily to secondary storage?
Correct Answer: Option A
Explanation:
Virtual memory combines physical RAM with temporary space on the hard drive (paging/swap file) to let the system handle larger memory loads than physical RAM capacity allows.
Virtual memory combines physical RAM with temporary space on the hard drive (paging/swap file) to let the system handle larger memory loads than physical RAM capacity allows.
This question belongs to:
Computer
Operating Systems
Question #17
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In Linux systems, who is the superuser that possesses unrestricted access permissions to all files and system commands?
Correct Answer: Option D
Explanation:
The 'root' user is the conventional name of the system administrator account in Unix-like operating systems, carrying complete administrative rights.
The 'root' user is the conventional name of the system administrator account in Unix-like operating systems, carrying complete administrative rights.
This question belongs to:
Computer
Operating Systems
Question #18
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What is the core purpose of a device driver in an operating system?
Correct Answer: Option A
Explanation:
Device drivers are specialized programs that enable the Operating System to communicate effectively with external hardware components and peripherals.
Device drivers are specialized programs that enable the Operating System to communicate effectively with external hardware components and peripherals.
This question belongs to:
Computer
Operating Systems
Question #19
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Which of the following Android components replaced the older Dalvik Virtual Machine (DVM) to provide faster app execution via Ahead-Of-Time (AOT) compilation?
Correct Answer: Option D
Explanation:
ART (Android Runtime) replaced Dalvik starting from Android 5.0 (Lollipop), improving application performance through Ahead-Of-Time compilation.
ART (Android Runtime) replaced Dalvik starting from Android 5.0 (Lollipop), improving application performance through Ahead-Of-Time compilation.
This question belongs to:
Computer
Operating Systems
Question #20
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Which command-line interface shortcut in Windows opens the Run dialog box directly?
Correct Answer: Option B
Explanation:
Pressing the Windows Key + R opens the 'Run' dialog box, allowing users to type and run programs, commands, or open folders instantly.
Pressing the Windows Key + R opens the 'Run' dialog box, allowing users to type and run programs, commands, or open folders instantly.
This question belongs to:
Computer
Operating Systems
