In Linux, the 'dd' command is used for: MCQ with Answer and Explanation

Question
In Linux, the 'dd' command is used for:
A. Copying and converting data at a low level
B. Duplicating files
C. Displaying disk usage
D. Deleting directories
Answer: Option A
Solution (By JKSSB Mock Tests)
dd is a powerful utility for block-level copying, creating disk images, and data conversion.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
Which technology allows multiple distinct operating system instances to run simultaneously on a single physical host computer machine?
A. Disk Defragmentation
B. Virtualization (via Hypervisors)
C. Spooling
D. Multithreading
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Correct Answer: Option B

Explanation:
Virtualization uses a hypervisor abstraction layer to divide physical hardware pools into multiple self-contained Virtual Machines (VMs) running separate operating systems.
This question belongs to: Computer Operating Systems
Question #2
Which terminal utility in Linux is used to display or change the networking routing, interface parameters, and wireless configuration settings?
A. chmod
B. ip (or ifconfig)
C. ping
D. uname
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Correct Answer: Option B

Explanation:
The modern 'ip' utility framework handles device configuration, link management, and addressing schemas in Linux environments.
This question belongs to: Computer Operating Systems
Question #3
Which component of the Android architecture contains core C/C++ libraries like WebKit, OpenGL ES, and SQLite?
A. Native C/C++ Libraries (and Android Runtime)
B. Hardware Abstraction Layer
C. Applications Layer
D. Java API Framework
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Correct Answer: Option A

Explanation:
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
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