Hi Gurus,

I was about to do Linux certification(RHEL) and finding it difficult. So giving some practice tests and in my practice tests also not finding the answers, Could you please help me with answers for the below :


Question 1)
Scenario
You need to set up a client which connects to a development database instead of the production database. You need to configure the client like the client in production and connect to the development database by host name.
Question Based on the scenario above, how do you connect the client to the development database instead of the production database without having to modify the application configuration?

Choice 1
Create a second A record in DNS for the database server host name, and enter the development client IP address.

Choice 2
Create an entry in the routing table to permit only requests to the desired IP address.

*Choice 3
Add an entry to the /etc/hosts file on the client to point to the development database server, and add hosts: files to /etc/nsswitch.conf.

Choice 4
Add an entry to /etc/resolv.conf to point to the development database server.

Choice 5
Add an entry in the /etc/sysconfig/network file to point the development database server host name to the desired IP address.


Question 2)
How do you permit all users to create cron jobs?

Choice 1
Add "account required pam_stack.so service=system-auth" to /etc/pam.d/crond.

Choice 2
Create an empty /etc/cron.allow file.

Choice 3
Add "allusers" to CRONDARGS in /etc/sysconfig/crond.

Choice 4
Run "chmod 755 /usr/bin/crontab" as root.

Choice 5




Question 3)
Which command do you use to obtain the UUID for a partition?

Choice 1
id

Choice 2
uuid

Choice 3
fdisk -l

Choice 4
vol_id -t

Choice 5
blkid -o list



Question 4)
Scenario
You need to copy a directory tree from a remote system. All the file systems on the remote system are read-only, and the remote system accepts SSH connections only.
Question Based on the scenario above, which command do you use to copy the files?

Choice 1
ssh -R 2020:localhost:20 remote; ftp localhost

Choice 2
rsync -avz rsync://remote/remote/tree

Choice 3
scp -pr remote:remote/tree ./

Choice 4
ssh remote 'tar xf - remote/tree' | tar cf -

Choice 5
wget --mirror remote/tree -o ./


Question 5)
Which command do you use to determine the secondary groups containing user bob.smith?

Choice 1
getent passwd bob.smith

Choice 2
gid bob.smith

Choice 3
showgroup bob.smith

Choice 4
groups bob.smith

Choice 5
grep bob.smith /etc/passwd


Question 6)
Users are complaining of poor system performance. Upon investigating, you determine an application indexing process called 123index is consuming enough CPU cycles to affect other services on the machine. You cannot abort the indexing process without corrupting data, so you decide to change the priority at which the indexing process can consume CPU cycles. The PID of 123index is 5645.
Question Based on the scenario above, how do you limit the 123index process from consuming too many CPU cycles and affecting other users?

Choice 1
echo 10 > /proc/5645/sched

Choice 2
renice 10 -p 5645

Choice 3
HUP -n 10 -p 5645

Choice 4
nice 5645

Choice 5
kill -HUP 5645 --respawn --nice 10



Question 7)
#!/bin/sh thetime=$(date) tar czf ~/myarchive.tar.gz ~/files/* echo $thetime
Question What is the result when the sample code above is executed?

Choice 1
The script exits with no output displayed.

Choice 2
The date and time before the tar command ran is displayed.

Choice 3
The script returns to the prompt and displays exit 0.

Choice 4
The output of the FIFO tar file is displayed.

Choice 5
The contents of the myarchive.tar.gz file is displayed.


Question8)
Which command do you use to tunnel X traffic over SSH?

Choice 1
ssh -R 6001:remotehost:6001 remotehost

Choice 2
ssh remotehost startx -X

Choice 3
ssh -X remotehost

Choice 4
ssh -x remotehost

Choice 5
ssh -L 6001:remotehost:6001 remotehost



Question9)
Which command do you use to update a new RHEL 7 server?

Choice 1
apt-get dist-upgrade

Choice 2
yum dist-upgrade

Choice 3
yum update

Choice 4
update-all

Choice 5
rpm --update


Question10)
Which command do you use to display the network interfaces on a server with multiple network cards?

Choice 1
ip --list

Choice 2
ip link

Choice 3
ipconfig /a

Choice 4
route -n

Choice 5
nstat


Question11)
Which command do you use to view the running processes on a system and what state they are in, ordered by how much of the CPU they each use?

Choice 1
free -m

Choice 2
cpu

Choice 3
top

Choice 4
ps aux

Choice 5
ps -a


Question12)
In /etc/exports, which client specifier uses NIS?

Choice 1
IP address

Choice 2
CIDR

Choice 3
hostname

Choice 4
DNS name with wildcard

Choice 5
netgroup



Question 13)
$ cat .bash_profile # .bash_profile # Get the aliases and functions if [ -f ~/.bashrc ]; then . ~/.bashrc fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH
Question Based on the terminal output above, how do you add the directory /usr/local/sbin to the user's $PATH?

Choice 1
Add a line with PATH=/usr/local/sbin before export PATH.

Choice 2
Add a line with SEARCH=/usr/local/sbin before the first line with PATH.

Choice 3
Change PATH=$PATH:$HOME/bin to PATH=$PATH:$HOME/bin:/usr/local/sbin.

Choice 4
Change PATH=$PATH:$HOME/bin to PATH=$PATH:$HOME/bin:/usr:/local:/sbin.

Choice 5
Change PATH=$PATH:$HOME/bin to PATH=$PATH:$HOME/bin:/usr/local.


Question14)
In which base directory are man pages located?

Choice 1
/usr/man

Choice 2
/usr/share/man_pages

Choice 3
/usr/share/doc

Choice 4
/usr/share/man

Choice 5
/etc/man


Question 15)
Terminal Output
$ cat logrotate.conf /tmp/pacct { size 10k create 700 user user rotate 3 }
Question Based on the terminal output above, the pacct file is rotated when:

Choice 1
3 days have elapsed.

Choice 2
the logrotate service runs.

Choice 3
it reaches 10 KiB in size.


Choice 4
it reaches 11 KiB in size.

Choice 5
it reaches 700 KiB in size.



Question 16)
When configuring a new server, you need to limit the number of connections to 25 for any services controlled by xinetd.
Question Based on the scenario above, which entry do you add to the /etc/xinetd.conf file?

Choice 1
iptables --hitcount 25 -j DROP

Choice 2
cps = 25 30

Choice 3
log_on_success = 25

Choice 4
log_on_failure > 25

Choice 5
instances = 25


Question 17)
Terminal Output
# crontab -l 1 3 * * 6 /usr/local/sbin/specialbackup
Question Based on the terminal output above, when does the
script /usr/local/sbin/specialbackup execute?

Choice 1
On the sixth day of each month at 3:01 A.M.

Choice 2
On Saturday at 1:03 A.M.

Choice 3
Every Sunday at 3:01 A.M.

Choice 4
On the sixth month at 1:03 A.M.

Choice 5
Every Saturday at 3:01 A.M.

Question 18)
To find information on a specific system call, you run the man command and receive the following error:

bash: man: command not found
Question Based on the scenario above, which package do you install to obtain the base man utility and documents?

Choice 1
man-db

Choice 2
base

Choice 3
man-base

Choice 4
man-pages-base

Choice 5
manpages


Question 19)
Scenario
You need to set your RHEL 7 server to start multi-user mode, but you do not want to start Xwindows by default.
Question Based on the scenario above, which command do you use to accomplish this task?

Choice 1
run systemctl set-default multi-user.target

Choice 2
run systemctl isolate graphical.target

Choice 3
run ln -sf /usr/lib/systemd/system/multi-user.service /etc/systemd/system/default.wants/.

Choice 4
edit /etc/sysconfig/desktop and set 'DESKTOP="NONE"'

Choice 5
touch /etc/noxwindows


Question20)
Which tools are required for you to make and use a swap file?

Choice 1
cp, mkfifo, swapon

Choice 2
cpio, mkfs, mount

Choice 3
tar, mktemp, fdisk

Choice 4
touch, mknod, mount

Choice 5
dd, mkswap, swapon


Question 21)

Scenario
On a server you manage, you need to run a script which reindexes a large table of keys. Your shift ends at 4:00 P.M., but you must schedule the task to run just once and run no earlier than 6:30 P.M. today.
Question Based on the scenario above, which commands do you run to execute the script "reindex_keys"?

Choice 1
at 1830
/root/reindex_keys

Choice 2
at 0630
/root/reindex_keys

Choice 3
echo "/root/reindex_keys" > /etc/cron.hourly
/etc/init.d/cron reload

Choice 4
anacron run /root/reindex_keys @ 18:30
/etc/init.d/anacron reload

Choice 5
schedule 18:30 /root/reindex_keys
schedule set


Question 22)
Terminal Output
$ ls -l /dev/null crw-rw-rw- 1 root root 1, 13 Apr 2 09:20 /dev/null
Question Based on the terminal output above, /dev/null is a:

Choice 1
directory.

Choice 2
named pipe.

Choice 3
socket.

Choice 4
world-writable file.

Choice 5
character device.

Question 23)

Scenario
A developer advises you that library calls to glib2 are failing. You review the change control log for the server and discover updates were performed that are not related to glib2.
Question Based on the scenario above, which log do you review to determine if the glib2 package was updated in error?

Choice 1
/var/log/audit

Choice 2
/var/log/wtmp

Choice 3
/var/log/rpm.log

Choice 4
/etc/yum/cache

Choice 5
/var/log/yum.log


Question24)
When configuring anacrontab, which unit do you use for the delay field?

Choice 1
Seconds

Choice 2
Minutes

Choice 3
Hours

Choice 4
Days

Choice 5
Weeks


Question 25)
During startup, which process does RHEL 7 start first?

Choice 1
swapd

Choice 2
inet

Choice 3
systemd

Choice 4
auditd

Choice 5
ntpd


Question26)
Which command shows the switches available for the dd command?

Choice 1
manpages dd

Choice 2
helpfile dd

Choice 3
man dd

Choice 4
dd --docs

Choice 5
more /usr/share/doc/dd/README



Question27)
Which crontab entry do you use to run a scheduled job every 6 minutes?

Choice 1
*/6 * * * * command

Choice 2
@minute*6 * * @daily*7 command

Choice 3
* */6 * * 2-6 command

Choice 4
* * * * */6 @weekday command

Choice 5
0,6,12,18,24,30,36,42,48,54 * * * command


Question28)
Which command do you use to examine a binary file to determine which library files should be added to a chroot environment?

Choice 1
ld

Choice 2
file

Choice 3
ldd

Choice 4
hexdump

Choice 5
yum


Question29)
Which logrotate configuration directive do you use to permit rotation of a log whose writer must keep the file open?

Choice 1
sharedscripts

Choice 2
compress

Choice 3
closewriter

Choice 4
notifempty

Choice 5
copytruncate



Question 30)
$ ps -aux | grep ssh root 3710 0.0 0.0 49848 136 ? Ss 20:39 0:00 /usr/sbin/sshd
Question The "S" in the terminal output above signifies the /usr/sbin/sshd process is:

Choice 1
in an interruptible sleep state.

Choice 2
a dead process.

Choice 3
a defunct process.


Choice 4
stopped by a control signal.

Choice 5
in high priority mode.


Question 31)
Terminal Output
# grep '^services' /etc/nsswitch.conf services: files
Question Based on the terminal output above, where does xinetd resolve a port number when none is specified in a configuration entry?

Choice 1
/etc/services

Choice 2
/etc/hosts

Choice 3
/etc/protocols

Choice 4
/etc/networks

Choice 5
/etc/resolv.conf


Question 32)

Terminal Output
$ ./testfiles Too many open files
Question Why do you receive the error message above?

Choice 1
The file system is out of inodes.

Choice 2
The process reached the limit on open file descriptors.

Choice 3
The current working directory has too many files.

Choice 4
The system process table is full.

Choice 5
The temporary directory has too many files.

Question 33)
Terminal Output
$ echo foo >&3 bash: 3: Bad file descriptor
Question What does the error message above indicate?

Choice 1
The process reached the limit on open file descriptors.

Choice 2
The file system is full.

Choice 3
The current working directory has too many files.

Choice 4
The user has insufficient privileges to create the file "3".

Choice 5
The process has no open file descriptor numbered 3.

Question 34)
Terminal Output
$ ls -l /usr/tmp lrwxrwxrwx 1 root root 13 Mar 27 15:18 /usr/tmp -> ../var/tmp
Question Based on the terminal output above, /usr/tmp is a:

Choice 1
directory.

Choice 2
temporary link

Choice 3
world-writable file.

Choice 4
symbolic link.

Choice 5
hard link.

Question 35)
Scenario
You have two Ethernet cards with addresses on separate subnets for each card. Traffic is not routing between the cards even though the cards are configured correctly.
Question Based on the scenario above, which command do you use to temporarily enable routing between the cards?

Choice 1
echo 1 > /proc/sys/net/ipv4/conf/default/mc_forwarding

Choice 2
echo 1 > /proc/sys/net/ipv4/ip_forward

Choice 3
echo 1 > /proc/sys/net/ipv4/all/mc_forwarding

Choice 4
echo 0 > /proc/sys/net/ipv4/all/mc_forwarding

Choice 5
echo 0 > /proc/sys/net/ipv4/ip_forward


Question 36)
Where are log files located?

Choice 1
/var/log

Choice 2
/tmp

Choice 3
/usr/log

Choice 4
/log

Choice 5
/etc


Question 37)
Scenario
While working on an RHEL workstation, you need to connect to an NFS export from a server named hugo which only has a single export to /mnt/tip. You do not remember the name of the export, and the administrator for that server is not in the office.
Question Based on the scenario above, which commands do you use to determine the name of the export and mount it?

Choice 1
nmap hugo
mount hugo:mount /mnt/tip

Choice 2
showmount -e hugo
mount -t nfs hugo:export /mnt/tip

Choice 3
showmount -v hugo
mount hugo:export /mnt/tip

Choice 4
nfs --show-exports hugo
mount hugo:export /mnt/tip

Choice 5
fdisk -l
mount hugo:* /mnt/tip


Question 38)
Scenario
You create a script called "off_site_backup" in /usr/local/sbin to back up some data to an offsite server. The script must run daily to ensure you have a backup of the company data offsite.
Question Based on the scenario above, which command do you use to run the script?

Choice 1
ln -s /usr/local/sbin/off_site_backup /etc/cron.daily/off_site_backup

Choice 2
ln -s /etc/sysconfig/cron.d/off_site_backup /usr/local/sbin/off_site_backup

Choice 3
at * /usr/local/sbin/off_site_backup

Choice 4
ln -s /etc/init/off_site_backup /usr/local/sbin/off_site_backup

Choice 5
at 0530 /usr/local/sbin/off_site_backup

That's a huge amount of questions to answer.
-::- I don't think anyone here would be willing to answer 'all of them'. -::-

Your best bet is to purchase the Red Hat Enterprise Linux Exam Guide Book to help you.
http://www.amazon.com/RHCSA-Linux-Ce.../dp/0071765654

Study this book as well.
http://www.amazon.com/Practical-Guid.../dp/0133477436

Dave009,

I am amazed that you are even asking us to answer those practice questions for you.

What good will it do if we give you the 38 correct answers?

Where is YOUR input?

What will have YOU learned from the exercise?

I suggest that you follow Ztcoracat's recommendations and start putting in some serious effort yourself, otherwise you have no chance of obtaining RHEL certification in the future.

Just to get you started here is the answer to Question 3:

http://lmgtfy.com/?q=Which+command+d...+partition%3F+

1 members found this post helpful.

Truly amazing. Folks asking us to do their homework is bad but asking to take their tests is beyond common sense.

Answer this, what good is your certification if YOU don't earn it? If someone gives you a job and you can't do the work - what do you think happens next?

Common guys, I am not asking for explanations, if you can then do it, else leave it...
I am an EA, what the heck will I do with a Linux certification.. It is just passion for technology

The approach here is wrong. You need to understand the question and answers. Sounds like your trying to dump your way to the cert.

If you're going for RHCE and can't answer the question (Question 3) how to get a UUID for partitions, then your not ready.

Not sure what an EA is.

1 members found this post helpful.

Another thing too...what kind of lab do you have setup to test these questions out?

Dave009,

What exactly ARE you asking for then?

What is your primary motivation for visiting this LQ forum and asking for the answers to these 38 questions?

Your comments have left me, for one, simply bewildered.

Better keep your day job.
Preparation: The act of preparing or getting ready.

Exactly so. The point of any set of questions – or of "certifications" in general – is that these are supposed to be things that you need to be able to know, and the "boots on the ground questions" that you need to be able to answer. It does absolutely nothing for you to ask someone else to answer thirty-eight(!) questions for you.

... and it speaks volumes, not in a way that is favorable to you, that you should try.

If your employer is paying for you to take a certification, "good for them." But they are doing it so that you gain knowledge. The fact that you are then able to correctly answer most questions like these is merely evidence that you (might) have done so. It, like the piece of sheepskin itself, is merely secondary. If you "co-opt" the process of actually learning, you're only cheating them ... and, yourself. You're wasting your own time.

A, A, B, C, A, B, B, A, D, E, .... C's for all the rest.

Remember to bring a #2 pencil.

Use regular ballpoint pen on your inner arm, sharpie and most felt tip markers just don't come off for days!

@rtmistler,

There are no As, Bs, or Cs, so I am afraid that you scored 0/38.

Is it the case that you want the answers but you don't want to know how to come up with the answers, or do I misunderstand? What's an EA? A certificate is simply someone recognised as an authority giving their word that the holder of the certificate has achieved some level of understanding.

How long have you been using GNU/Linux? Maybe you need more experience before trying for certification?

Lol... I cannot control my laugh after seeing the responces. Either everyone knows the answer to only question number 3 or do not know at all.

Doesn't look like a Linux forum to me, More of a useless lecture giving forum.

My Lab: RHEL 7

EA Stands for Enterprise Architect. You can check how many do you have in your Organization, one or two or hundreds ?

Let me answer myself, at least few in this forum will learn -


Question Answer
=========================
1) Choice 3
2) Choice 1
3) Choice 5
4) Choice 1
5) Choice 4

and so on... It's so simple, read the question and answer, no use giving useless lectures.. We are all Technical Guys with less or more competency from one another in a specific field. Hope this helps.. If I am wrong somewhere, correct me but request you not to scribble which is of no use to anyone.

1 members found this post helpful.

Dave009,

You obviously have plenty of spare time on your hands.

Is business a bit slow at the moment?