Which of the following is a feature of a preemptive multitasking system? MCQ with Answer and Explanation

Question
Which of the following is a feature of a preemptive multitasking system?
A. No process can be interrupted once started
B. Only one process runs at a time
C. Processes must voluntarily yield CPU
D. The OS can interrupt a process to give CPU time to another
Answer: Option D
Solution (By JKSSB Mock Tests)
Preemptive multitasking allows the OS to forcibly preempt a running process to allocate CPU to another, ensuring responsiveness.
This question belongs to: Computer Operating Systems
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Which Android component is responsible for managing the lifecycle of an application process?
A. PackageManager
B. ActivityManager
C. ProcessManager
D. WindowManager
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Correct Answer: Option B

Explanation:
ActivityManager manages the overall application lifecycle, including starting and killing processes based on memory needs.
This question belongs to: Computer Operating Systems
Question #2
In Windows Operating Systems, which system tool is explicitly used to optimize disk space by rearranging fragmented files into contiguous sectors?
A. Task Manager
B. Disk Cleanup
C. Chkdsk
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Correct Answer: Option D

Explanation:
Disk Defragmenter consolidates fragmented files on a hard drive to improve read/write access speeds and overall system performance.
This question belongs to: Computer Operating Systems
Question #3
Which of the following is an example of a network operating system?
A. Windows Server
B. Linux Desktop
C. Android
D. macOS
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Correct Answer: Option A

Explanation:
A network OS like Windows Server provides services for network management, file sharing, and user administration across a network.
This question belongs to: Computer Operating Systems
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