Which Linux command is used to display the kernel version? MCQ with Answer and Explanation

Question
Which Linux command is used to display the kernel version?
A. uname -r
B. lsb_release -a
C. kernel -v
D. version
Answer: Option A
Solution (By JKSSB Mock Tests)
uname -r shows the kernel release version; uname -a gives all system info.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which term describes the operational condition where a CPU is constantly swapping memory pages between RAM and disk, leading to massive system slowdown?
A. Thrashing
B. Caching
C. Multiprocessing
D. Paging
Discuss
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Correct Answer: Option A

Explanation:
Thrashing occurs when virtual memory resources are overused, causing the OS to spend more time moving data between disk and RAM than executing actual application instructions.
This question belongs to: Computer Operating Systems
Question #2
What type of program is 'systemd' in modern Linux operating systems?
A. The primary sound card device driver.
B. An open-source web browser package.
C. An initialization system and service manager that bootstraps user space and manages system daemons.
D. A high-performance text editor library.
Discuss
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Correct Answer: Option C

Explanation:
systemd is the modern standard init framework and system manager used in Linux to bootstrap user components and control services.
This question belongs to: Computer Operating Systems
Question #3
In Windows, the 'Task Manager' performance tab shows:
A. List of running processes
B. CPU, memory, disk, and network usage graphs
C. User accounts
D. Startup programs
Discuss
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Correct Answer: Option B

Explanation:
The performance tab provides real-time graphs and statistics for system resources like CPU, RAM, disk, and network.
This question belongs to: Computer Operating Systems
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