Oracle 1Z0-460 Online Practice Questions and Exam Preparation

Oracle 1Z0-460 Online Questions & Answers

• Question 21:

  Examine the output of the yum.conf configuration file from o Oracle Linux 6 server.

  

  What does the "installonly_limit=3" option mean?

  A. Only three users can use the yum command simultaneously to install package on Oracle Linux 6 server.
  B. Only three Linux packages can be installed in one invocation of the yum command.
  C. Only three repository channels can be used for installing Linux packages.
  D. Only three versions of packages listed in installonlypkgs can be installed simultaneously.
  D. Only three versions of packages listed in installonlypkgs can be installed simultaneously.

  ---

  installonly_limit

  Number of packages listed in installonlypkgs to keep installed at the same time. Setting to 0 disables this feature. Default is '3'. Note that this functionality used to be in the "installonlyn" plugin, where this option was altered via. tokeep. Note that as of version 3.2.24, yum will now look in the yumdb for a installonly attribute on installed packages. If that attribute is "keep", then they will never be removed. Reference: yum.conf

• Question 22:

  Examine the following kernel boot command-line parameters.

  kernel /vmlinuz-2.6.32-220.e16 ro root = /dev/VolGroup00/LogVol00 init = /bin/bash ether = 0, 0, eth1 rhgb quiet

  Which two statements are true?

  A. An unrecognized kernel boot command-line parameter has been used.
  B. The system will boot without password.
  C. Boot argument ether will force probing for a second ethernet card (NIC).
  D. It will not probe for any hard drive.
  C. Boot argument ether will force probing for a second ethernet card (NIC).
  D. It will not probe for any hard drive.

  ---

  C: Ether parameter:

  The most common use of this parameter is to force probing for a second ethercard, as the default is to only probe for one (with 2.4 and older kernels). This can be accomplished with a simple:

  ether=0,0,eth1

  Note:

  *

  rhgb stands for redhat graphical boot. This is a GUI mode booting screen with most of the information hidden.

  *

  quiet parameter hides the majority of the boot messages before rhgb starts.

• Question 23:

  You have to collect information about your Oracle Linux 6 system, such as hardware configuration, installed software packages, configuration, and operational state send it to Oracle Support. Which tool will help you gather this information for sending it to Oracle Support?

  A. sosreport
  B. iostat
  C. kdump
  D. strace
  E. systemstat
  A. sosreport

  ---

  sosreport - Generate debugging information for this system

  sosreport generates a compressed tarball of debugging information for the system it is run on that can be sent to technical support reps that will give them a more complete view of the overall system status.

  Incorrect:

  Not B: The iostat command is used for monitoring system input/output device loading by observing the time the devices are active in relation to their average transfer rates. The iostat command generates reports that can be used to change

  system configuration to better balance the input/output load between physical disks.

  Not C: kdump.conf is a configuration file for the kdump kernel crash collection service.

  kdump.conf provides post-kexec instructions to the kdump kernel. It is stored in the initrd file managed by the kdump service. If you change this file and do not want to restart before it takes effect, restart the kdump service to rebuild to initrd.

  Not D: strace - trace system calls and signals

• Question 24:

  The Oracle "helper" package (RPM), formerly known as "Oracle-validated" (which helps meet prerequisites for installing Oracle software), has been renamed. What is the new name?

  A. Oracle-11gR2-validated
  B. Oracle-11fR2-valid_package
  C. Oracle-rdbms-server-11gR2-preinstall
  D. Oracle-11gR2-preinstall
  C. Oracle-rdbms-server-11gR2-preinstall

  ---

  Now that the certification of the Oracle Database 11g R2 with Oracle Linux 6 and the Unbreakable Enterprise Kernel has been announced, we are glad to announce the availability of oracle-rdbms-server- 11gR2-preinstall, the Oracle RDBMS Server 11gR2 Pre-install RPM package (formerly known as oracle- validated). Designed specifically for Oracle Linux 6, this RPM aids in the installation of the Oracle Database.

  Reference: Oracle RDBMS Server 11gR2 Pre-Install RPM for Oracle Linux 6 has been released

• Question 25:

  Which rpm command can be used to find the package that owns the /etc/rsyslog.conf file?

  A. rpm query /etc/rsyslog.conf
  B. rpm gf /etc/rsyslog.conf
  C. rpm q1 /etc/rsyslog.conf
  D. rpm q /etc/rsyslog.conf
  B. rpm gf /etc/rsyslog.conf

  ---

  Package Selection Options include:

  -f

  Query package owning

  Note:

  rpm -q -- What does it do?

  One of the nice things about using RPM is that the packages you manage don't end up going into some kind of black hole. Nothing would be worse than to install, upgrade, and erase several different packages and not have a clue as to

  what's on your system. In fact, RPM's query function can help you get out of sticky situations like:

  *

  You're poking around your system, and you come across a file that you just can't identify. Where did it come from?

  *

  Your friend sends you a package file, and you have no idea what the package does, what it installs, or where it originally came from.

  *

  You know that you installed XFree86 a couple months ago, but you don't know what version, and you can't find any documentation on it.

  The list could go on, but you get the idea. The rpm -q command is what you need. If you're the kind of person that doesn't like to have more options than you know what to do with, rpm -q might look imposing. But fear not. Once you have a handle on the basic structure of an RPM query, it'll be a piece of cake.

• Question 26:

  What does the following line in the modprobe.conf file indicate? options netconsole netconsole = [email protected]/eth0, [email protected]/00:0C:A3:35:9C

  A. Netconsole logging is set up to send messages to a server at the IP address 192.168.1.200 by using the eth0 device.
  B. Netconsole logging is set up to send messages to a server at the IP address 192.168.1.200 by using the port number 6666.
  C. Netconsole logging is set up to send messages to a server at IP address 192.168.1.200 by using the UDP port 514.
  D. Netconsole logging is set up for two clients with IP addresses of 192.168.1.200 and 192.168.1.100 on this server.
  B. Netconsole logging is set up to send messages to a server at the IP address 192.168.1.200 by using the port number 6666.

  ---

  Example: options netconsole [email protected]/eth0,[email protected]/00:1A:A0:D2:55:66 6666 => Server source port

  10.0.0.1 => Server IP eth0 => Server NIC 514 => Client listening port

  10.0.0.2 => Client IP 00:1A:A0:D2:55:66 => Client MAC

• Question 27:

  The change that are made by using echo command, like the one shown in the example below, are not persistent and disappear when the system us restarted. Which file should be modified to make configuration changes across reboots?

  # echo www.example.com > /proc/sys/kernel/hostname

  A. /etc/sys/sysct1.conf
  B. /etc/sysconfig.conf
  C. /etc/sysct1.conf
  D. /proc/sysct1.conf
  A. /etc/sys/sysct1.conf

  ---

  A configuration file exists for the purpose of persisting changes, named /etc/sysct1.conf. When booting, your server starts the procps service that reads this configuration file and applies all settings in it.

  Note:

  * If you've ever needed to change the hostname for Red Hat Linux, CentOS or similar operating systems, you can do so easily with one simple command.

  Just use the echo command to replace the contents of /proc/sys/kernel/hostname with your new host name.

  # echo hostname.com > /proc/sys/kernel/hostname

  Then restart the network interfaces:

  # /etc/init.d/network restart

  Shutting down interface venet0: [ OK ]

  Shutting down loopback interface: [ OK ]

  Bringing up loopback interface: [ OK ]

  Bringing up interface venet0: RTNETLINK answers: File exists RTNETLINK answers: File exists [ OK ]

  Now you can use the hostname command to verify that it has changed.

• Question 28:

  View the exhibits.

  

  

  Examine the output of sar command and the top command in the Exhibits. Which statement is the correct interpretation of this data?

  A. The system is running low on swap space and memory.
  B. CPU is Idle and the system has plenty of free memory available.
  C. The CPU utilization is high and one process is using most of the CPU.
  D. The system is idle with very little memory, CPU, and I/O utilization.
  C. The CPU utilization is high and one process is using most of the CPU.

  ---

  From the top exhibit we see that npviewer.gin uses 73.4% of the available CPU. Note:

  *

  sar - Collect, report, or save system activity information.

  *

  The sar command writes to standard output the contents of selected cumulative activity counters in the operating system. The accounting system, based on the values in the count and interval parameters, writes information the specified

  number of times spaced at the specified intervals in seconds.

  *

  sar u 2 5

  Report CPU utilization for each 2 seconds. 5 lines are displayed.

• Question 29:

  Which three steps are involved in the installing Ksplice on servers that will be updated?

  A. You have to be logged as user "ksplice" on the server you want to prepare and install Oracle Ksplice on.
  B. The Uptrack package needs access directly or through a proxy to the Oracle public yum repository (http://public-yum.oracle.com/) to download the required packages for the uptrack-* utilities to be able to work correctly.
  C. Download the install-uptrack script using the "wget N http://www.ksplice.com/uptrack/install-uptrack" command.
  D. You have to be logged in as user "root" on the server you want to prepare and install Oracle ksplice on.
  E. The uptrack package will set up a yum repository (/etc/yum.repos.d/ksplice-uptrack.repo) and download the required package for the uptrack-* utilities to be able to work correctly.
  F. Download the ksplice ISO image from https://edelivery.oracle.com/linux and then run the "sh install- uptrack" script from the ISO image.
  B. The Uptrack package needs access directly or through a proxy to the Oracle public yum repository (http://public-yum.oracle.com/) to download the required packages for the uptrack-* utilities to be able to work correctly.
  C. Download the install-uptrack script using the "wget N http://www.ksplice.com/uptrack/install-uptrack" command.
  D. You have to be logged in as user "root" on the server you want to prepare and install Oracle ksplice on.

  ---

  B: Your system must have access to the internet to install Ksplice. If you are using a proxy, set the proxy in your shell:

  export http_proxy=http://proxy.company.com:port export https_proxy=http://proxy.company.com:port CD: Once you have an access key run the following commands as root, replacing YOUR_ACCESS_KEY with the access key you received upon sign-up: wget -N https://www.ksplice.com/uptrack/install-uptrack sh install-uptrack YOUR_ACCESS_KEY uptrack-upgrade y

  E: If you'd like Ksplice Uptrack to automatically install updates as they become available, run:

  sh install-uptrack YOUR_ACCESS_KEY --autoinstall in place of the above install-uptrack command, or set "autoinstall = yes" in your /etc/uptrack/uptrack.conf after installation. Reference: Ksplice, Installation instructions

• Question 30:

  You want to allow multiple users the write access to files within the same directory, in addition, you want all the new files created in this directory to be of the required group instead of the primary ID of the user who creates the file. How do you accomplish this?

  A. Set the setgid bit on the directory.
  B. Change the group owner of the new files manually.
  C. Run a cron job to change the group owner.
  D. Change the primary group ID of every user to the required group.
  A. Set the setgid bit on the directory.

  ---

  Linux: SETGID on directory

  SETGID stands for SET Group ID. We can use the command chmod to set the group ID bit for a directory.

  chmod g+s mydir

  or with numeric mode:

  chmod 2775 mydir

  After the change, the permission of the directory "mydir" becomes "drwxrwsr-x".

  drwxrwsr-x 3 zen zen 4096 2010-03-18 19:57 mydir

  But what is so special about setting the group ID for a directory? The trick is that when another user creates a file or directory under such a directory "mydir", the new file or directory will have its group set as the group of the owner of "mydir", instead of the group of the user who creates it.

  For example, if user2 belongs to the groups "user2" (main group) and "zen", and he creates a file "newfile" under the diretory "mydir", "newfile" will be owned by the group of "zen" instead of user2's main group ID "user2".