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Q11. What types of packages are contained in the Oracle Public YUM server? 

A. Base releases of Oracle and RedHat Linux distributions 

B. Base releases of Oracle Linux and extra/updates for Oracle Linux 

C. Red Hat Compatible Kernel, UEK, and Oracle database software 

D. Base release of Oracle Linux 

Answer:

Explanation: The Oracle public yum server offers a free and convenient way to install the latest 

Oracle Linux packages as well as packages from the Oracle VM installation media via a yum client. 

You can download the full Oracle Linux and Oracle VM installation media via 

edelivery.oracle.com/linux. 

Note: 

Getting Started 

Oracle Linux 4, Update 6 or Newer 

# cd /etc/yum.repos.d 

# mv Oracle-Base.repo Oracle-Base.repo.disabled 

# wget http://public-yum.oracle.com/public-yum-el4.repo 

Oracle Linux 5 

# cd /etc/yum.repos.d 

# wget http://public-yum.oracle.com/public-yum-el5.repo 

Oracle Linux 6 

# cd /etc/yum.repos.d 

# wget http://public-yum.oracle.com/public-yum-ol6.repo 

Oracle VM 2 

# cd /etc/yum.repos.d 

# wget http://public-yum.oracle.com/public-yum-ovm2.repo 

Open the yum configuration file in a text editor 

Locate the section in the file for the repository you plan to update from, e.g. [el4_u6_base] 

Change enabled=0 to enabled=1 

yum list 

yum install firefox 

You may be prompted to confirm the import of the Oracle OSS Group GPG key. 


Q12. Your 32-bit i686 architecture system in registered with the Oracle Unbreakable Linux Network. RPM package example -1 .0.0-1 is already installed and the application is used constantly. You want to download the latest version of the example RPM package. You do not want to install the package until you have coordinated with the program’s current users. Which option will allow you to download until you have coordinated with the program’s current users. Which option will allow you to download the latest version of the RPM package, but not install it? 

A. # rpm –Uvh http://linix.oracle.com/rpms/i686/example-1.0.1-1.i686.rpm 

B. # yum –no-update example 

C. # yumdownloader example 

D. # yum –get example-1.0.1 

Answer:

Explanation: yumdownloader is a program for downloading RPMs from Yum repositories. 

Synopsis 

yumdownloader [options] package1 [package2...] 

Note: 

*yum - Yellowdog Updater Modified 

yum is an interactive, rpm based, package manager. It can automatically perform system updates, including dependency analysis and obsolete processing based on "repository" metadata. It can also perform installation of new packages, removal of old packages and perform queries on the installed and/or available packages among many other commands/services (see below). yum is similar to other high level package managers like apt-get and smart. 


Q13. The sshd service running and you execute the following command: 

# chkconfig sshd off 

What happens when you run this chkconfig command? 

A. The sshd service disabled only for runlevel 5. 

B. The sshd service id disabled for runlevels 2, 3, 4, and 5, but the ssh service is still available until the next reboot. 

C. The sshd service is disabled for runlevels 2, 3, 4, and 5 and ssh service is stopped. 

D. The sshd service is disabled only for current runlevel. 

Answer:


Q14. You have kdump service enabled on your Oracle Linux system and experience a kernel crash. The crash dump file is created on your system, but you are not aware where this crash file was created. Which two places can you find the path information where the crash dump file is being generated on your system? 

A. Check the settings in the /etc/kdump.conf file. 

B. Check the settings in the /etc/sysconfig/kdump.conf file. 

C. Check the target settings by running the system-config-kdump command. 

D. Check the settings in the /proc/sys/kernel/crash.conf file. 

Answer: A,C 

Explanation: A:When a kernel crash is captured, the core dump can be either stored as a file in a local file system, written directly to a device, or sent over a network using the NFS (Network File System) or SSH (Secure Shell) protocol. Only one of these options can be set at the moment, and the default option is to store the vmcore file in the /var/crash/ directory of the local file system. To change this, as root, open the /etc/kdump.conf configuration file in a text editor and edit the options. 

C:You can use the system-config-kdump GUI to setup Kdump: 


Q15. Which yum command will you use if you want to find out the name of the package that has the /etc/sysconfig/nfs file? 

A. # yum info /etc/sysconfig/nfs 

B. # yum search /etc/sysconfig/nfs 

C. # yum list installed | grep /etc/sysconfig/nfs 

D. # yum check /etc/sysconfig/nfs 

Answer:

Explanation: yum list installed [glob_exp1] [...] 

List the packages specified by args. If an argument does not match the name of an available package, it is assumed to be a shell-style glob and any matches are printed. 

Incorrect: 

Not A: 

info 

Is used to list a description and summary information about available packages 

Not B: 

search 

This is used to find packages when you know something about the package but aren't sure of it's name. By default search will try searching just package names and summaries, but if that "fails" it will then try descriptions and url. 

Not D:check 

Checks the local rpmdb and produces information on any problems it finds. 


Q16. You have to collect data by using the OS Watcher tool to help diagnose a performance issue on your Oracle Linux system. You need to collect data every 30 seconds by using this tool and archive this data for a period of three days. Which is the OS Watcher tool option that can be used to collect this data from your system? 

A. # ./startOSWbb.sh –t 30 –p 3 

B. # ./startOSWbb.sh 30 72 

C. # ./startOSWbb.sh –int = 30 –days = 3 

D. # ./startOSWbb.sh 30 3 

Answer:

Explanation: Example: 

/startOSWbb.sh 60 24 

collect every 1 minute and keep 24 hours of archive files. 


Q17. Your Oracle Linux system has two network interfaces – eth0 and eth1. You have to change the netmask and the IP address of the eth1 network interface. Which configuration file would you edit to make these changes? 

A. /proc/net/ifcg-eth1 

B. /etc/sysconfig/network-scripts/eth1 

C. /etc/sysconfig/network/ifcg-eth1 

D. /etc/sysconfig/network-scripts/ifcfg-eth1 

Answer:

Explanation: The "/etc/sysconfig/network-scripts/ifcfg-eth0" file holds the network configuration for the "eth0" adapter. If you have multiple network adapters, you would expect additional configuration files (eth1, eth2 etc.). 

Note: 

*The "/etc/sysconfig/network" file holds top-level networking configuration, including the hostname 

and gateway settings. 


Q18. A system administrator wants to view all running processes on the system in real time, to find out what RAM has been allocating to each process. What system command should be used? 

A. ps –ef 

B. ps ax 

C. top 

D. meminfo 

Answer:

Explanation: top - display Linux tasks 

The top program provides a dynamic real-time view of a running system. 

It candisplaysystem summary information as well as a list of tasks 

currently being managed by the Linux kernel. The types of system sum-mary information shownand the types, order and size of information 

displayed for tasks are all user configurable and thatconfiguration 

can be made persistent across restarts. 

Incorrect: 

Not A, Not B: 

ps displays information about a selection of the active processes. 

To see every process on the system using standard syntax: 

ps -e 

ps -ef 

ps -eF 

ps -ely 

To see every process on the system using BSD syntax: 

ps ax 

ps axu 

Not D:meminfo - provide information about memory 

The meminfo() function provides information about virtual and physical memory particular to the calling process. The user or developer of performance utilities can use this information to analyze system memory allocations and develop a better understanding of the factors affecting application performance. 


Q19. What are the two benefits of configuring network interface bonding? 

A. aggregating two or more Network Interfaces (NICs) toactas one logical interface 

B. creating a static address that is bound to one NIC 

C. providing either failover or load-balancing to two or more Network Interfaces (NICs) 

D. binding a network interface to the embedded firewall (IPTables) for port filtering 

Answer: A,C 

Explanation: Network bonding refers to the combination of network interfaces on one host for redundancy and/or increased throughput. 


Q20. You run the following command as the root user to set properties of a network interface (eth0): 

# ifconfig eth0 192.0.2.102 netmask 255.255.255.0 up 

Setting network interface properties with the ifconfig utility is not persistent across system reboots. Which file would you edit to make settings and to make them persist across system reboots? 

A. /etc/sysconfig/network file 

B. /etc/sysconfig/network/ifcg-eth0 file 

C. /etc/sysconfig/network-scripts/ifcfg-eth0 file 

D. /etc/sysconfig/network-scripts/eth0 file 

Answer:

Explanation: Modifytheeth0config file Opentheconfiguration using a text editor such as vi/vim, and make sure file read as follows for eth0 interface # vi /etc/sysconfig/network-scripts/ifcfg-eth0