Operating Systems MCQs
Practice Operating System MCQs covering Windows, Linux, Android, booting, multitasking and multiprocessing concepts with answers and explanations.
Question #61
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Which of the following is an accurate definition of 'Context Switching'?
Correct Answer: Option D
Explanation:
Context switching is the mechanical process of storing and restoring the execution state (context) of a CPU core so that execution can resume from the same point later.
Context switching is the mechanical process of storing and restoring the execution state (context) of a CPU core so that execution can resume from the same point later.
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Computer
Operating Systems
Question #62
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Which security mechanism in Android keeps individual apps completely isolated from each other so they cannot access another app's data without explicit permission?
Correct Answer: Option C
Explanation:
Android leverages App Sandboxing, backed by Linux user group permissions, to run each application in an isolated environment so it cannot access other applications' operational files.
Android leverages App Sandboxing, backed by Linux user group permissions, to run each application in an isolated environment so it cannot access other applications' operational files.
This question belongs to:
Computer
Operating Systems
Question #63
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Which of the following commands is used in Linux to copy files or directories from one location to another?
Correct Answer: Option A
Explanation:
The 'cp' command is used in Unix-like systems to copy files or entire directory trees from a source path to a destination path.
The 'cp' command is used in Unix-like systems to copy files or entire directory trees from a source path to a destination path.
This question belongs to:
Computer
Operating Systems
Question #64
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What type of memory allocation problem occurs when free memory blocks are broken down into tiny, disconnected gaps that are too small to serve new process requests?
Correct Answer: Option C
Explanation:
External fragmentation occurs when total free memory space exists to satisfy a allocation request, but it is split up non-contiguously into tiny pockets.
External fragmentation occurs when total free memory space exists to satisfy a allocation request, but it is split up non-contiguously into tiny pockets.
This question belongs to:
Computer
Operating Systems
Question #65
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Which default user interface environment is standard across Microsoft Windows operating systems?
Correct Answer: Option A
Explanation:
Explorer.exe provides the core Windows Graphical Shell user interface, including the desktop screen, taskbar, and file navigation.
Explorer.exe provides the core Windows Graphical Shell user interface, including the desktop screen, taskbar, and file navigation.
This question belongs to:
Computer
Operating Systems
Question #66
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In operating systems, what is the primary function of the 'Medium-Term Scheduler'?
Correct Answer: Option A
Explanation:
The medium-term scheduler removes processes from main memory temporarily (swapping out) to reduce the degree of multiprogramming and manage memory constraints.
The medium-term scheduler removes processes from main memory temporarily (swapping out) to reduce the degree of multiprogramming and manage memory constraints.
This question belongs to:
Computer
Operating Systems
Question #67
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Which Android version introduced the concept of runtime permissions, allowing users to grant or deny permissions dynamically rather than during app installation?
Correct Answer: Option A
Explanation:
Android 6.0 Marshmallow completely overhauled the application permission model by introducing runtime permissions to enhance user data security.
Android 6.0 Marshmallow completely overhauled the application permission model by introducing runtime permissions to enhance user data security.
This question belongs to:
Computer
Operating Systems
Question #68
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Which file in older BIOS-based Windows operating systems (like Windows XP) held the boot configuration options and startup menus?
Correct Answer: Option D
Explanation:
Legacy Windows systems (up to Windows XP) relied on the text-based 'boot.ini' file located in the root system folder to read boot configuration parameters.
Legacy Windows systems (up to Windows XP) relied on the text-based 'boot.ini' file located in the root system folder to read boot configuration parameters.
This question belongs to:
Computer
Operating Systems
Question #69
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Which Linux terminal command allows a user to safely change their current working directory location?
Correct Answer: Option D
Explanation:
The 'cd' command stands for 'change directory' and is used to switch locations across folders in CLI navigation.
The 'cd' command stands for 'change directory' and is used to switch locations across folders in CLI navigation.
This question belongs to:
Computer
Operating Systems
Question #70
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What does a 'Symmetric' multi-threaded system share across all active threads running within the exact same process?
Correct Answer: Option D
Explanation:
Threads belonging to the same process share their parent process's memory space, program code section, global variables, and open operating system descriptors.
Threads belonging to the same process share their parent process's memory space, program code section, global variables, and open operating system descriptors.
This question belongs to:
Computer
Operating Systems
