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Oracle Enterprise Linux: Fundamentals Sample Questions:

1. User smith on station2 is trying to chat with the remote user bob on station1 using the talk command, smith receives an error message as shown below:
[smith@station2 ~]$talk [email protected]
[No connection yet]
[ Error on read from talk daemon: Connection refused ]
[smith@station2 ~]$
What can the root user do to resolve the issue? (Choose two.)

A) let smith retry the talk request with UDP port 518 open on both systems
B) let smith retry talk after restarting the xinetd service with ntalk enabled on both systems
C) let smith retry talk by reading from STDIN and sending to bob
D) let smith retry talk after restarting the network service with the UDP port 517 blocked on both systems
E) let smith retry talk after changing the group of talk command to tty

2. What would be the output of the nested for loop given below?
for ((i=1; i<=5; i++))
do for ((j=1; j<=5; j++)) do echo -n "$i" done echo mm done

A) 54321 54321 54321 54321 54321
B) 11111 22222 33333 44444 55555
C) 55555 44444 33333 22222 11111
D) 12345 12345 12345 12345 12345

3. Observe the following NFS share exported by server1.
[root@server1 ~]$ cat /etc/exports /data . example. com(ro,root_squash)
You have logged in as root on station1 and try to access the /data NFS share on server1 as root.
Which statement holds true in this context?

A) The NFS share will be accessed with the privileges of nfsnobody.
B) The NFS share will be accessed with the privileges of nobody.
C) The NFS share will be accessed with the privileges of the root user.
D) The access to NFS share will be denied.

4. As a root user you execute the commands as shown below:
[root@station1 ]# a=$((10 % 4 + 6 * 2)) [root@station1 ]# echo $a
What would be the output of the echo statement?

A) 10
B) 2
C) 14
D) 12

5. You want to secure the server1 server by denying root access through ssh.
Which file would you edit on server1 to achieve this task?

A) ~/.ssh/config
B) /etc/ssh/sshd_config
C) ~/.ssh/rc
D) /etc/ssh/sshrc

Solutions: