Which of the following is a feature of the Linux ext4 file system? MCQ with Answer and Explanation

Question
Which of the following is a feature of the Linux ext4 file system?
A. Compression
B. Case-insensitivity
C. Journaling
D. Built-in encryption
Answer: Option C
Solution (By JKSSB Mock Tests)
ext4 supports journaling to protect data integrity in case of crashes; other features like encryption or compression are optional or not native.
This question belongs to: Computer Operating Systems
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Question #1
Which file system option developed by Microsoft is explicitly optimized for flash memory storage drives like USB thumb drives and SD cards?
A. ext2
B. FAT12
C. NTFS
D. exFAT
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Correct Answer: Option D

Explanation:
exFAT (Extended File Allocation Table) was introduced to bridge the gap between FAT32 and NTFS, specifically optimized for portable flash storage units.
This question belongs to: Computer Operating Systems
Question #2
Which Linux command is used to view the contents of a file?
A. All of the above
B. less
C. more
D. cat
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Correct Answer: Option A

Explanation:
cat, more, and less all display file contents; less is interactive, cat dumps entire file.
This question belongs to: Computer Operating Systems
Question #3
Android is primarily based on which operating system kernel?
A. Unix Kernel
B. Linux Kernel
C. Hybrid Kernel
D. Windows NT Kernel
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Correct Answer: Option B

Explanation:
Android is an open-source operating system designed for mobile devices, built directly on top of a modified version of the Linux kernel.
This question belongs to: Computer Operating Systems
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