1Z0-460 Online Practice Questions and Answers

Correct Answer: DE

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Commercial technical support is available through Oracle's Oracle Linux Support program, which supports Oracle Linux, and existing RHEL or CentOS installations (i.e. without reinstallation).

Note:

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The Unbreakable Enterprise Kernel Release 2 is Oracle's second major release of its heavily tested and optimized operating system kernel for Oracle Linux 5 and Oracle Linux 6. Unbreakable Enterprise Kernel Release 2 is based on the mainline Linux kernel version 3.0.16 and boasts a wide range of new features and improvements relevant for enterprise workloads.

Incorrect:

Not A, not B: Unbreakable Enterprise Kernel Release 2 can be installed on Oracle Linux 5 Update 8 or

newer, as well as on Oracle Linux 6 Update 2 or newer.

Correct Answer: C

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

Note:

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

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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.

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sar u 2 5

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

Correct Answer: B

* Oracle Software Delivery Cloud. Here you can find downloads for the Oracle Linux Operating System, Oracle VM, and Oracle VM Templates for both Linux and Solaris.

Correct Answer: AB

Oracle's Unbreakable Enterprise Kernel KEY FEATURES:

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Modern kernel based on 2.6.32, optimized by Oracle for server deployments

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Includes OCFS (Oracle Cluster File System)2 1.6 for clustered volumes

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Includes OFED 1.5.1

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Advanced NUMA support

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New diagnostic and tracing tools, including performance counters

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Complete data integrity checking from application to disk

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Hardware fault management

Correct Answer: A

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".

Correct Answer: A

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

Correct Answer: C

Modify the eth0 config file Open the configuration 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

Correct Answer: C

Example:

[oracle@oraclelinux6 ~]$ yum info bash

Loaded plugins: refresh-packagekit, security Installed Packages Name : bash Arch : x86_64 Version : 4.1.2 Release : 9.el6_2 Size : 3.0 M Repo : installed From repo : ol6_u3_base Summary : The GNU Bourne Again shell URL : http://www.gnu.org/software/bash License : GPLv3+ Description : The GNU Bourne Again shell (Bash) is a shell or command language : interpreter that is compatible with the Bourne shell (sh). Bash : incorporates useful features from the Korn shell (ksh) and the

C : shell (csh). Most sh scripts can be run by bash without : modification.

Correct Answer: AC

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:

Correct Answer: A

According the grub .conf file you have got 8 seconds to choose whether to boot the first entry.

Now if you want to change, and let say you want the second grub entry as booting system by default, just change the line: default=0 by default=1

Correct Answer: AD

A: fdisk - Partition table manipulator for Linux

D: If you do have a choice of using a disk label/partition tool during installation for example, the parted tool during Oracle Solaris live image installation use a tool that allows alignment by sector. This means you can specify a partition start and end using a sector number.

Incorrect

Not C: chkdsk is not a linux command.

Correct Answer: C

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.

Correct Answer: AC

Oracle Linux 6 ships with two sets of kernel packages:

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Unbreakable Enterprise Kernel [kernel-uek-2.6.32-100.28.5.el6] Only available on the x86_64 (64 bit) platform Installed and booted by default

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Red Hat compatible Kernel [kernel-2.6.32-71.el6] Installed by default

Reference: Oracle Linux 6 Release Notes

Correct Answer: B

Execute a cron job every 5 Hours

The second field is for hours. If you specify * in this field, it runs every hour. If you specify */5 in the 2nd field, it runs every 5 hours as shown below. 0 */5 * * * /home/ramesh/backup.sh

Correct Answer: ACD

In order to install the Oracle Database 11g R2 on Oracle Linux 6, your system needs to meet a few prerequisites, as outlined in the Linux Installation Guides. Using the Oracle RDBMS Server 11gR2 Preinstall RPM, you can complete most of the pre-installation configuration tasks.

The package:

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(A) Causes the download and installation of various software packages and specific versions needed for database installation, with package dependencies resolved via yum

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(C) Creates the user oracle and the groups oinstall and dba, which are the defaults used during database installation

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(D) Modifies kernel parameters in /etc/sysctl.conf to change settings for shared memory, semaphores, the maximum number of file descriptors, and so on

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(D) Sets hard and soft shell resource limits in /etc/security/limits.conf, such as the number of open files, the number of processes, and stack size to the minimum required based on the Oracle Database 11g Release 2 Server installation requirements

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Sets numa=off in the kernel boot parameters for x86_64 machines