Which of the following is the official default file system used by most modern distributions of Linux? MCQ with Answer and Explanation

Question
Which of the following is the official default file system used by most modern distributions of Linux?
A. HFS+
B. ext4
C. FAT16
D. NTFS
Answer: Option B
Solution (By JKSSB Mock Tests)
The Fourth Extended File System (ext4) is the current standard, highly reliable file system used by default across major Linux distributions.
This question belongs to: Computer Operating Systems
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Practice More Operating Systems Questions

Question #1
In Linux, the 'chown' command can change both owner and group. Which option changes only the group?
A. chown :group file
B. chown user:
C. chown .group
D. chown user:group
Discuss
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Correct Answer: Option A

Explanation:
chown :group sets the group ownership without changing the owner; chown user:group sets both.
This question belongs to: Computer Operating Systems
Question #2
What is the purpose of the Android 'ConnectivityManager'?
A. To manage Wi-Fi connections only
B. To check data usage
C. To monitor and manage network connectivity (Wi-Fi, cellular, etc.)
D. To control Bluetooth
Discuss
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Correct Answer: Option C

Explanation:
ConnectivityManager provides information about active network connections and allows apps to request network status.
This question belongs to: Computer Operating Systems
Question #3
Which Linux command is used to add a new user to the system?
A. usermod
B. adduser
C. newuser
D. useradd
Discuss
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Correct Answer: Option D

Explanation:
useradd is the low-level command; adduser is a friendlier front-end on some distros, but useradd is common.
This question belongs to: Computer Operating Systems
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