Operating Systems MCQs
Practice Operating System MCQs covering Windows, Linux, Android, booting, multitasking and multiprocessing concepts with answers and explanations.
Question #21
Report Error
What type of OS is designed to guarantee that critical actions or computing responses occur within precise, predictable time constraints?
Correct Answer: Option A
Explanation:
A Real-Time Operating System (RTOS) is meant for environments where processing must happen within strict, predefined time margins (e.g., embedded systems, robotics).
A Real-Time Operating System (RTOS) is meant for environments where processing must happen within strict, predefined time margins (e.g., embedded systems, robotics).
This question belongs to:
Computer
Operating Systems
Question #22
Report Error
Which of the following commands is used in Linux to change the read, write, and execute permissions of a specific file?
Correct Answer: Option C
Explanation:
The 'chmod' command stands for 'change mode' and is used to alter access permissions for files and directories in Unix-like systems.
The 'chmod' command stands for 'change mode' and is used to alter access permissions for files and directories in Unix-like systems.
This question belongs to:
Computer
Operating Systems
Question #23
Report Error
In a symmetric multiprocessing (SMP) system, how are the processing responsibilities shared among available CPUs?
Correct Answer: Option C
Explanation:
In Symmetric Multiprocessing (SMP), multiple peer processors share a common main memory and execute threads concurrently under equal standing.
In Symmetric Multiprocessing (SMP), multiple peer processors share a common main memory and execute threads concurrently under equal standing.
This question belongs to:
Computer
Operating Systems
Question #24
Report Error
Which system state preserves open documents and applications to the hard drive or SSD, and then shuts down power completely?
Correct Answer: Option B
Explanation:
Hibernate mode saves current system state data directly onto the hard disk (hiberfil.sys) and powers off the machine completely, consuming zero electricity.
Hibernate mode saves current system state data directly onto the hard disk (hiberfil.sys) and powers off the machine completely, consuming zero electricity.
This question belongs to:
Computer
Operating Systems
Question #25
Report Error
What is the name of the default bootloader utility widely used by modern distributions of Linux, such as Ubuntu or Fedora?
Correct Answer: Option C
Explanation:
GRUB (Grand Unified Bootloader) is the standard and most widely used bootloader across modern Linux distributions.
GRUB (Grand Unified Bootloader) is the standard and most widely used bootloader across modern Linux distributions.
This question belongs to:
Computer
Operating Systems
Question #26
Report Error
Which Linux command is used to display the full pathname of the current working directory?
Correct Answer: Option D
Explanation:
The 'pwd' command stands for 'print working directory', which outputs the exact directory path that the user is currently interacting with.
The 'pwd' command stands for 'print working directory', which outputs the exact directory path that the user is currently interacting with.
This question belongs to:
Computer
Operating Systems
Question #27
Report Error
Which component of the Android architecture contains core C/C++ libraries like WebKit, OpenGL ES, and SQLite?
Correct Answer: Option B
Explanation:
Android includes a set of native C/C++ libraries providing core features like web rendering, graphics acceleration, and database engines.
Android includes a set of native C/C++ libraries providing core features like web rendering, graphics acceleration, and database engines.
This question belongs to:
Computer
Operating Systems
Question #28
Report Error
What is the primary objective of a 'Cold Boot' procedure?
Correct Answer: Option C
Explanation:
A cold boot occurs when the power switch is flipped from 'Off' to 'On', triggering a complete hardware check and OS load from scratch.
A cold boot occurs when the power switch is flipped from 'Off' to 'On', triggering a complete hardware check and OS load from scratch.
This question belongs to:
Computer
Operating Systems
Question #29
Report Error
Which of the following is an example of an open-source operating system?
Correct Answer: Option C
Explanation:
Linux is developed under an open-source license, allowing anyone to view, modify, and redistribute its underlying source code freely.
Linux is developed under an open-source license, allowing anyone to view, modify, and redistribute its underlying source code freely.
This question belongs to:
Computer
Operating Systems
Question #30
Report Error
What happens during a page fault in virtual memory management?
Correct Answer: Option C
Explanation:
A page fault is an interrupt raised by hardware when a program tries to access a memory page mapped in virtual space but not loaded into the physical RAM.
A page fault is an interrupt raised by hardware when a program tries to access a memory page mapped in virtual space but not loaded into the physical RAM.
This question belongs to:
Computer
Operating Systems
