What is the default process management command used in Linux to change the scheduling priority of an already running process? MCQ with Answer and Explanation

Question
What is the default process management command used in Linux to change the scheduling priority of an already running process?
A. renice
B. nice
C. chmod
D. kill
Answer: Option A
Solution (By JKSSB Mock Tests)
While 'nice' sets process priority during initial launch, the 'renice' command alters the priority tier of an already active running process ID.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which structural concept refers to a piece of code that must execute atomically and cannot be accessed by more than one process at any given moment?
A. Shared Page Room
B. System Hook
C. Deadlock Loop
D. Critical Section
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Correct Answer: Option D

Explanation:
The Critical Section is a structural segment of program code that accesses shared resources or variables and must not be concurrently executed by multiple processes.
This question belongs to: Computer Operating Systems
Question #2
In Linux, the 'at' command is used to:
A. List scheduled jobs
B. Run jobs immediately
C. Schedule a job to run once at a specified time
D. Schedule recurring jobs
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Correct Answer: Option C

Explanation:
at schedules one-time tasks; cron is for recurring jobs; atq lists pending at jobs.
This question belongs to: Computer Operating Systems
Question #3
Which Windows component stores the low-level system settings, device driver profiles, and application parameters in a hierarchical database format?
A. Windows Registry
B. Program Files
C. System.ini
D. Control Panel
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Correct Answer: Option A

Explanation:
The Windows Registry functions as a unified, hierarchical system data vault holding fundamental configurations for the OS kernel and applications.
This question belongs to: Computer Operating Systems
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