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RedHat RH033 Sample Questions
Question # 1
Which of the following commands is used to set down the interface and flush all itsaddresses?
A. ifup B. ifdown C. ifconfig D. down
Answer: B
Explanation:
The ifdown command is used to set down the interface and flush all its addresses. It is
possible to let
ifdown check the interface if the interface is still used before setting it down. If the interface
is used it may then discard the using processes or refuse setting it down.
To enable this feature, check /etc/sysconfig/network/config file.
Answer option A is incorrect. The ifup command is used to bring up a preconfigured
interface for networking. It is usually invoked by the network script at boot time or by the
PCMCIA/hotplug system. It can also be used to start interfaces manually on the command
line. It activates the link, adds addresses and other parameters and sets up the routes for
an interface.
Answer option C is incorrect. The ifconfig commands displays the basic settings of a
network device.
Answer option D is incorrect. There is no such command as down.
Question # 2
Which of the following is NOT the feature of SELinux in the Red Hat enterprise Linux?
A. SELinux applies to all users, including root. B. All process and files have a context. C. SELinux implements Mandatory Access Control (MAC) security in Red Hat EnterpriseLinux. D. SELinux does not provide Kernel-level security.
Answer: D
Explanation:
SELinux is an operating system based on Linux which includes Mandatory Access Control.
The
SELinux provides Kernel-level security for Red Hat Enterprise Linux.
Answer options C, B, and A are incorrect. These are the features of SELinux.
What are the features of SELinux?
The features of SELinux are as follows:
SELinux provides Kernal-level security.
SELinux implements Mandatory access control (MAC) security in Red Hat Enterprise
Linux.
SELinux assigns every file and process on the system a context, identifying its type and
purpose.
SELinux enforces a policy that dictates which actions a given type of process may take on
a given type of file
Question # 3
You work as the Network Administrator for Tech perfect Inc. The company has a Linuxbased network. You are a root user on the Red Hat operating system. You want to view all
files created after the myfile.txt file. Which of the following commands should you use to
accomplish the task?
A. find -newer myfile.txt B. find -new myfile.txt C. find -recent myfile.txt D. find -not newer myfile.txt
Answer: A
Explanation:
This command when used with the mtime option will list all files created after the myfile.txt
file.
The find command searches system for files that comply with certain numeric criteria such
as, the date of the last change to the file's data (-
mtime), the date of the last change metadata (-ctime) or the date of the last time the file
was read (-
atime). There are also corresponding timestamp matching criteria that perform searches in
times relative to the timestamps of other files
using -anewer, -cnewer and -newer, which tests mtime.
Question # 4
You run the ps -aux command on the terminal. You get the following output: You notice that the process id 24224 is showing the status message S on the stat column. What does this indicate?
A. The process id 24224 is in sleeping status. B. The process id 24224 is hanged. C. The process id 24224 is in stopped status. D. The process id 24224 is in running status.
Answer: A
Explanation:
According to the scenario, the S status message shows that the process id 24224 is in
sleeping status.
The ps -aux command reports the status of processes currently running on a Linux
computer. It shows the following status messages:
Question # 5
You want to repeat the last command you entered in the bash shell. Which of the following commands will you use?
A. history !# B. history !! C. history ## D. history !1
Answer: B
Explanation:
The history !! command shows the previously entered command in the bash shell. In the
bash shell, the history command is used to view the recently executed commands. History
is on by default. A user can turn off history using the command set +o history and turn it on
using set –o history. An environment variable HISTSIZE is used to inform bash about how
many history lines should be kept. The following commands are frequently used to view
and manipulate history:
Question # 6
John works as the Network Technician for Tech Perfect Inc. The company has a Linuxbased network. John is a root user on the Red Hat operating system. John has two files named foo.txt and student.txt, which are too long. John wants to view the output of both the files on one screen at a time. Which of the following commands should John use to accomplish thistask?
A. touch foo.txt student.txt B. cat foo.txt | student.txt C. cp foo.txt student.txt D. cat foo.txt student.txt | less
Answer: D
Explanation:
The cat command concatenates both files foo.txt and student.txt together and | (pipe) will
send the standard output of the cat command to the standard input of the less command,
and this will show the output of both files on one screen at a time.
Question # 7
Which of the following commands is used to access Windows resources from Linux
workstation?
A. rsync B. mutt C. scp D. smbclient
Answer: D Explanation: smbclient is a command-line tool that provides access to SMB/CIFS shares. What is the smbclient command? smbclient is a command-line tool that provides access to SMB/CIFS shares. smbclient is a samba client with an "ftp like" interface. It is a useful tool to test connectivity to a Windows share. It can be used to transfer files, or to look at share names. In addition, it has the ability to backup and restore files from a server to a client and visa versa. Example: #smbclient -L server1 The above command will list all shares on server1. Some useful options are as follows:
Question # 8
Which of the following statements are true about open source software?Each correct answer represents a complete solution. Choose two.
A. In OSS access to source code by third parties commonly requires the party to sign a nondiscloser agreement. B. It is software whose license does not allow for the distribution of the software source's source code C. Open source software and its source code must be freely distributable. D. In OSS all users must be able to modify the source code and create derived works.
Answer: C,D Explanation: Open source software is software that has been released under an Open Source Initiative
(OSI) certified license. The definition includes 10 criteria, which are described as follows:
Open source software is software that has been released under an Open Source Initiative
(OSI) certified license. The definition includes 10 criteria, which are described as follows:
1. Free Redistribution: The license allows any party selling or giving away the software as a
component of an aggregate software distribution comprising programs from many different
sources. 2. Source code: Anyone can modify the source code. 3. Derived Works: The license must allow changes and derived work under the same
conditions as the license of the original software. 4. Integrity of the authors source code: To maintain the integrity of the original authors
work, the license may require that changes to the code be provided in patch form. 5. No Discrimination Against Persons or Groups: The license must be nondiscriminatory
with respect to persons or group of persons.
Therefore, open source license are forbidden from locking anyone out of the process. 6. No Discrimination Against Fields of Endeavor: The license must not restrict anyone from
making use of the software in a specific field of endeavor. 7. Distribution of License: The license can be distributed to all but the rights attached to that
program must apply to all to whom the program is distributed. And no party can execute
any additional license. 8. License Must Not Be Specific to a Product: It may not require that the software be part of
particular distribution.
9. License Must Not Restrict Other Software: It may not restrict other non-open source
software. 10. License Must Be Technology-Neutral: It may not require the use of technology to apply
the license.
Answer options B and A are incorrect. These are the characteristics of closed source
software.
Question # 9
Mark is a newly appointed Network Technician for McNeil Inc. The company has a Linuxbased network. He is working on the Red Hat operating system. He wants to sort a file named marketing.txt in the reverse alphabetical order. Which of the following commands should Mark use to accomplish this task?
A. sort -u marketing.txt B. sort marketing.txt C. sort -n marketing.txt D. sort -r marketing.txt
Answer: D
Explanation:
This command will run sort on the file marketing.txt and sort the file in the reverse
alphabetical order.
Answer option B is incorrect. sort with no options is used to sort file alphabetically. It will not
sort the file in the reverse alphabetical order.
Answer option C is incorrect. The -n option used with the sort command sorts the text
numerically, instead of by characters.
Answer option A is incorrect. The -u option with sort removes duplicate lines from the
