In Linux, what does the command 'ls -l' display? MCQ with Answer and Explanation

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In Linux, what does the command 'ls -l' display?

A. Detailed file information including permissions, owner, size, and timestamp

B. Only file names

C. Files sorted by size

D. Hidden files as well

Answer: Option A

Solution (By JKSSB Mock Tests)

ls -l (long listing) displays permissions, number of links, owner, group, size, date, and filename.

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In Windows, the Registry is divided into which main hives?

A. HKEY_CONFIG, HKEY_DRIVERS, HKEY_SERVICES

B. HKEY_ROOT, HKEY_USER, HKEY_SYSTEM, HKEY_SOFTWARE

C. HKEY_LOCAL_MACHINE, HKEY_CURRENT_USER, HKEY_CLASSES_ROOT, HKEY_USERS, HKEY_CURRENT_CONFIG

D. HKEY_LOCAL, HKEY_REMOTE, HKEY_DEFAULT

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Correct Answer: Option C

Explanation:
The five root keys (hives) are HKLM, HKCU, HKCR, HKU, and HKCC.

This question belongs to: Computer Operating Systems

Question #2

Which of the following is a process scheduling algorithm that allocates CPU to the process with the shortest remaining time?

A. Multilevel Queue

B. Priority Scheduling

C. Round Robin

D. Shortest Job First (SJF)

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Correct Answer: Option D

Explanation:
SJF selects the process with the shortest total execution time; the preemptive version is Shortest Remaining Time First (SRTF).

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Question #3

What is the purpose of the Android 'ConnectivityManager'?

A. To control Bluetooth

B. To monitor and manage network connectivity (Wi-Fi, cellular, etc.)

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Correct Answer: Option B

Explanation:
ConnectivityManager provides information about active network connections and allows apps to request network status.

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