Which of the following commands is used to obtain a list of all files by modification time?

A. ls -l

B. ls -t

C. ls -i

D. ls -R

E. None of the above

Answer: Option B

Solution(By Examveda Team)

In Unix, the ls command is used to list directory contents. The -t option with ls is used to sort files by modification time, showing the most recently modified files first.
So, ls -t is the command used to obtain a list of all files sorted by modification time.