Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 111:

  View the Exhibit.

  

  After Installing the OS, you need to verify the network interface information. Which command was used to display the network interface information in the exhibit?

  A. ifconfiq -a

  B. ipadm show-addr

  C. svcs -1 network/physical

  D. netstat -a

  Correct Answer: B

  'ipadm show-addr' displays all the configured addresses on the system.

  Example: # ipadm show-addr ADDROBJ TYPE STATE ADDR lo0/v4 static ok 127.0.0.1/8 lo0/v6 static ok ::1/128

• Question 112:

  Which two accurately describe the Solaris IPS repository?

  A. It contains a collection of operating system patches.

  B. It contains a collection of software packages.

  C. All packages within an IPS package repository reside in a catalog.

  D. It is an ISO image of the Solaris installation media.

  E. The packages in a catalog are associated with a specific publisher.

  Correct Answer: BE

  Image Packaging System (IPS) is a new network based package management system included in Oracle Solaris 11. It provides a framework for complete software lifecycle management such as installation, upgrade and removal of software packages. IPS also enables you to create your own software packages, create and manage package repositories, and mirror existing package repositories.

  Oracle Solaris software is distributed in IPS packages. IPS packages are stored in IPS package repositories, which are populated by IPS publishers.

  E: The following command displays property information about the local repository.

  $ pkgrepo get -s /export/repoSolaris11

  SECTION PROPERTY VALUE publisher prefix solaris repository description This\ repository\ serves\ a\

  copy\ of\ the\ Oracle\ Solaris\ 11\ Build\ 175b\ Package\ Repository. repository name Oracle\ Solaris\ 11\

  Build\ 175b\ Package\ Repository repository version 4

  The value of the publisher prefix specifies that solaris is to be used in the following cases:

  When more than one publisher's packages are present and no publisher is specified in the package name

  in the pkg command

  When packages are published to the repository and no publisher is specified.

• Question 113:

  You have been asked to terminate a process that appears to be hung and will not terminate. The process table is shown below:

  root 15163 15156 0 12:51:15 pts/3 0:00 hungscript

  What command will terminate the process?

  A. kill -9 15163

  B. kill -1 15163

  C. kill -15 15163

  D. kill -2 15163

  Correct Answer: A

  Here we should use SIGTERM to terminate the process.

  Note:

  When no signal is included in the kill command-line syntax, the default signal that is used is ?5 (SIGKILL).

  Using the ? signal (SIGTERM) with the kill command ensures that the process terminates promptly.

  However, the ? signal should not be used to kill certain processes, such as a database process, or an

  LDAP server process. The result is that data might be lost.

  Tip - When using the kill command to stop a process, first try using the command by itself, without

  including a signal option. Wait a few minutes to see if the process terminates before using the kill

  command with the -9 signal.

• Question 114:

  On which is the open boot prom available?

  A. x86 only

  B. x86 64-Bit only

  C. SPARC only

  D. both x86 and x86 64-Bit

  E. x86, x86 64-Bit and SPARC

  Correct Answer: C

  No OpenBoot Environment on the Intel Platform. The Intel environment has no OpenBoot PROM or NVRAM. On Intel systems, before the kernel is started, the system is controlled by the basic input/output system (BIOS), the firmware interface on a PC. Therefore, many features provided by OpenBoot are not available on Intel systems.

  Note: The Open Boot PROM (OBP) bootloader only exists within SPARC. Before Solaris 10 01/06, the bootloader for Solaris x86 was a Sun customized bootstrap software. After Solaris 10 01/06, it uses GRUB, a well known bootloader that's commonly used in the Linux world.

  With GRUB, it's much easier to make the system dual-boot Linux and Solaris. GRUB extends the capabilities of the bootloader that was not available previously such as the ability to boot from a USB DVD drive. Those who have used Linux will be quite familiar with GRUB and its options.

• Question 115:

  The /usr/bin/p7zip file that is part of the p7zip package has been overwritten. This server is critical to production and cannot be rebooted. Identify the command that would restore the file without requiring a reboot.

  A. pkg verify p7zip

  B. pkg fix p7sip

  C. pkg rebuild-index p7zip

  D. pkg revert p7zip

  E. pkg uninstsll p7zip

  F. pkg install p7zip

  G. pkg install --no-backup-be p7sip

  H. pkg refresh p7zip

  Correct Answer: D

  Use the pkg revert command to restore files to their as-delivered condition.

• Question 116:

  You are the administrator of a system that a large number of developers work on. These developers crash the system, and their applications, on a regular basis.

  What command would you use to configure where the core files are saved?

  A. savecore

  B. dumpadm

  C. svcadm

  D. proc

  E. coreadm

  Correct Answer: E

  The coreadm command is used to specify the name and location of core files produced by abnormally-terminating processes.

• Question 117:

  You have a ZFS file system named /dbase/oral and you want to guarantee that 10 GB of storage space is available to that dataset for all data, snapshots, and clones.

  Which option would you choose?

  A. zfs set refreservation=10g dbase/oral

  B. zfs set quota=10g dbase/oral

  C. zfs set refquota=10g dbase/oral

  D. zfs set reservation=10g dbase/oral

  Correct Answer: D

  A ZFS reservation is an allocation of disk space from the pool that is guaranteed to be available to a dataset. As such, you cannot reserve disk space for a dataset if that space is not currently available in the pool. The total amount of all outstanding, unconsumed reservations cannot exceed the amount of unused disk space in the pool. ZFS reservations can be set and displayed by using the zfs set and zfs get commands. For example:

  # zfs set reservation=5G tank/home/bill # zfs get reservation tank/home/bill NAME PROPERTY VALUE SOURCE tank/home/bill reservation 5G local

• Question 118:

  Which operation will fail if the DNS configuration is incorrect?

  A. domainname

  B. ping localhost.

  C. ping 192.168.1.1

  D. ping 23.45.82.174

  E. ping www.oracle.com.

  F. cat /etc/resolv.conf

  Correct Answer: E

  www.oracle.com would have to be resolved to an IP name by the domain name service.

• Question 119:

  You start to execute a program by using the following command:

  ~/bigscript and

  You then determine that the process is not behaving as expected, and decide that you need to terminate the process.

  Based on the information shown below, what is the process number you should terminate?

  

  A. 15163

  B. 15156

  C. 15166

  D. 15165

  Correct Answer: A

  From the output exhibit we can deduce that the shell has id 15156.

  It has spawned three subprocesses:

  grep: id 15166

  ps -aef 15165

  The remaining 15163 must be the subshell (see note below). This is the id of the process which should be

  terminated.

• Question 120:

  Which two options are characteristics of a fast reboot?

  A. A fast reboot bypasses grub.

  B. A fast reboot cannot be used after a system panic on the x86 platform.

  C. A fast reboot can only be executed on the SPARC platform when the config/fastreboot_default property for the svc:/system/boot-config:default service is set to true.

  D. A fast reboot uses an in-kernel boot loader to load the kernel into memory.

  E. A fast reboot is the default on all platforms.

  Correct Answer: CD

  C: To change the default behavior of the Fast Reboot feature on the SPARC platform, so that a fast reboot is automatically performed when the system reboots, see below.

  The following example shows how to set the property's value to true on the SPARC platform, so that a fast reboot is initiated by default:

  # svccfg -s "system/boot-config:default" setprop config/fastreboot_default=true # svcadm refresh svc:/ system/boot-config:default

  D: Fast Reboot implements an in-kernel boot loader that loads the kernel into memory and then switches to that kernel. The firmware and boot loader processes are bypassed, which enables the system to reboot within seconds. The Fast Reboot feature is managed by SMF and implemented through a boot configuration service, svc:/ system/boot-config. The boot-config service provides a means for setting or changing the default boot configuration parameters. When the config/fastreboot_default property is set to true, the system performs a fast reboot automatically, without the need to use the reboot -f command. This property's value is set to true on the x86 platform. For task-related information, including how to change the default behavior of Fast Reboot on the SPARC platform, see Accelerating the Reboot Process on an x86 Based System.

  Note: One new feature, called Fast Reboot, will allow the system to boot up without doing the routine set of hardware checks, a move that can make system boot times up to two- and-a-half times faster, Oracle claimed. This feature can be handy in that an administrator applying a patch or software update across thousands of Solaris deployments can reboot them all the more quickly.