1Z0-460 Online Practice Questions and Answers

Correct Answer: C

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.

Correct Answer: D

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.

Correct Answer: AD

A (not C): ASMLib is an optional support library for the Automatic Storage Management feature of the

Oracle Database.

ASMLib allows an Oracle Database using ASM more efficient and capable access to the disk groups it is

using.

D (not B): The Oracle ASMLib kernel driver is now included in the Unbreakable Enterprise Kernel. No

driver package needs to be installed when using this kernel.

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: D

*

To create a snapshot use

sudo btrfs subvolume snapshot /mnt/@ /mnt/@_snapshot

this will create a snapshot of the @ subvolume named @_snapshot located also in the top of the btrfs tree.

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btrfs subvolume snapshot [/]

Create a writable snapshot of the subvolume with the name in the directory.

Correct Answer: C

hd0,1 indicates the first hard drive and the second partition.

Note:

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grub - the grub shell

Enter the GRand Unified Bootloader command shell.

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In the following example we assume that the boot partition is located at /dev/hda5 and that GRUB must

be installed on the first disk's MBR.

grub> root (hd0,4) Filesystem type is ext2fs, partition type 0x83 grub> setup (hd0) Checking if "/boot/grub/stage1" exists... yes Checking if "/boot/grub/stage2" exists... yes Checking if "/boot/grub/e2fs_stage1_5" exists... yes Running "embed /boot/grub/e2fs_stage1_5 (hd0)"... 23 sectors are embedded.

succeeded Running "install /boot/grub/stage1 (hd0) (hd0)1+23 p (hd0,4)/boot/grub/stage2 /boot/grub/menu.lst"... succeeded Done. grub> quit The first command includes the location of the boot partition, thus indicating where the boot loader files are located. The second command installs GRUB on the MBR. For this purpose, a file called stage1_5 is used to grant GRUB access to the file system on the boot partition.

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: 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

Oracle Enterprise Manager Ops Center 12c is a foundational offering in the Oracle Enterprise Manager 12c solution. It introduces unique capabilities to strengthen Oracle Enterprise Manager 12c's ability to establish, manage, and support enterprise quality clouds delivered in an Infrastructure-as-a-Service model. With the launch of Oracle Enterprise Manager Ops Center 12c, Oracle Systems' customers utilizing SPARC, X86, Oracle Solaris, Oracle Linux (A), Oracle ZFS Storage Appliance, Oracle Switches, and both Oracle VM technologies can accelerate private cloud adoption faster at a lower cost. Oracle Enterprise Manager Ops Center 12c provides a comprehensive solution for operating system, firmware and BIOS configuration, bare metal and virtual machine provisioning, hardware fault analysis, automatic My Oracle Support service request generation (D), performance management, all while leveraging integrated diagnostics with automatic server pool resource policies.

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: C

top - display Linux tasks

The top program provides a dynamic real-time view of a running system. It can display system summary

information as well as a list of tasks currently being managed by the Linux kernel. The types of system

sum- mary information shown and the types, order and size of information displayed for tasks are all user

configurable and that configuration 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.

Correct Answer: AC

Oracle Linux 6 ships with two sets of kernel packages:

*

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

*

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

Reference: Oracle Linux 6 Release Notes

Correct Answer: A

Example: Create a yum .repo file: cd /etc/yum.repos.d cat > ol63iso.repo << EOF [ol6_base_media] name=Oracle Linux 6 Media baseurl=file:///mnt/iso/ol63/Server

gpgcheck=0

enabled=1

EOF

#

Incorrect:

Not B: Specifiy the directory, not the iso file name.

Not C: Enabled should be 0, not 1.

Not D: Use file: not http: to specify the directory

Correct Answer: D

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

Correct Answer: B

The '1' in "/proc/sys/net/ipv4/ip_forward" enables IP forwarding. A '0' signifies IP forwarding is disabled.