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Question 1

After running the command umount /mnt, the following error message is displayed:umount: /mnt: device is busy.What is a common reason for this message?

Options :

A : The kernel has not finished flushing disk writes to themounted device.

B : A user has a file open in the /mnt directory.

C : Another file system still contains a symlink to a file inside /mnt.

D : The files in /mnt have been scanned and added to the locate database.

E : The kernel thinks that a process is about toopen a file in /mnt for reading.

Answer: B

Question 2

Which of the following commands can be used to locate programs and their corresponding man pages and configuration files?

Options :

A : dirname

B : which

C : basename

D : query

E : whereis

Answer: A

Question 3

Which of the following commands will write a message to the terminals of all logged in users?

Options :

A : bcast

B : mesg

C : print

D : wall

E : yell

Answer: D

Question 4

Consider the following output from the command ls –i: 101-500 How would a new file named c.txt be created with the same inode number as a.txt (Inode 525385)?

Options :

A : ln –h a.txt c.txt

B : ln c.txt a.txt

C : ln a.txt c.txt

D : ln –f c.txt a.txt

E : ln –i 525385 c.txt

Answer: C

Question 5

In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)

Options :

A : cat /proc/self/mounts

B : free

C : mount

D : lsmounts

E : cat /proc/filesystems

Answer: A,C