Oracle Oracle Certifications 1Z0-821 Questions & Answers

• Question 161:

  Which two capabilities are provided by the OpenBoot PROM?

  A. a command to safely shut down the system

  B. hardware testing and initialization

  C. booting from a disk or network

  D. starting the GRUB loader

  Correct Answer: BC

  OpenBoot firmware is executed immediately after you turn on your system. The primary tasks of OpenBoot firmware are to:

  *

  Test and initialize the system hardware (B)

  *

  Determine the hardware configuration *Boot the operating system from either a mass storage device or from a network (C) *Provide interactive debugging facilities for testing hardware and software

• Question 162:

  Your system is assigned an IP address object 192.168.0.222/24. However, the net mask -- expressed as four octets -- is required. Which is the correct netmask?

  A. 255.0.0.0

  B. 255.255.0.0

  C. 255.255.255.0

  D. 255.255.255.24

  E. 255.255.255.255

  Correct Answer: C

  A 24-bit network mask is expressed as 255.255.255.0.

• Question 163:

  Which command should you choose to display the current parameters for the FSS scheduler?

  A. dispadmin - c FSS

  B. prionctl -c FSS

  C. dispadmin -c FSS -g

  D. priocntl -c FSS -g

  Correct Answer: C

  The dispadmin command displays or changes process scheduler parameters while the system is running.

  -c class

  Specifies the class whose parameters are to be displayed or changed. Valid class values are: RT for the

  real-time class, TS for the time-sharing class, IA for the inter-active class, FSS for the fair-share class, and

  FX for the fixed-priority class. The time-sharing and inter- active classes share the same scheduler, so

  changes to the scheduling parameters of one will change those of the other.

  -g

  Gets the parameters for the specified class and writes them to the standard output.

• Question 164:

  Oracle Solaris 11 kernel encounters a fatal error, and it results in a system panic. What type of file does this generate?

  A. a.out

  B. objdump

  C. core dump

  D. tape dump

  E. crash dump

  Correct Answer: C

  A kernel panic is a type of error that occurs when the core (kernel) of an operating system receives an instruction in an unexpected format or when it fails to handle properly. A kernel panic can also follow when the operating system can't recover from a different type of error. A kernel panic can be caused by damaged or incompatible software or, more rarely, damaged or incompatible hardware.

  When a server kernel panics it abruptly halts all normal system operations. Usually, a kernel process named panic() outputs an error message to the console and stores debugging information in nonvolitile memory to be written to a crash log file upon restarting the computer. Saving the memory contents of the core and associated debugging information is called a "core dump."

• Question 165:

  You have installed an update to the gzip package and need to "undo" .ho update and return the package to its "as-delivered" condition. Which command would you use?

  A. pkg undo

  B. pkg revert

  C. pkg fix

  D. pkg uninstall

  Correct Answer: B

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

• Question 166:

  You created a new zpool. Now you need to migrate the existing ZFS file system from pool1/prod to pool2/ prod.

  You have these requirements:

  1.

  Users must have access to the data during the migration, so you cannot shutdown the file system while the migration takes place.

  2.

  Because you want to copy the data as quickly as possible, you need to increase the server resources devoted to the ZFS migration.

  Which method would you use to modify the ZFS shadow migration daemon defaults to increase the concurrency and overall speed of migration?

  A. Svccfg - s filesystem/shadowd:defaultsetprop config_params/shadow_threads=integer: 16endsvcadm refresh filesystem/shadowd: default

  B. Specify the -b option with the zfs create command and increase the value of

  C. Use the -o -volblocksize=option with the zfs create command and increase the value of the default .

  D. Svccfg -s filesystem/zfs: defaultsetprop config_params/shadow_threads = integer: 16endsvcadm refresh filesystem/zfs:default

  Correct Answer: A

  shadowd is a daemon that provides background worker threads to migrate data for a shadow migration. A shadow migration gradually moves data from a source file system into a new "shadow" file system. Users can access and change their data within the shadow file system while migration is occurring.

  The shadowd service is managed by the service management facility, smf(5). Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The service's status can be queried using the svcs(1) command.

  The svccfg(1M) command can be used to manage the following parameter related to shadowd:

  config_params/shadow_threads

  Note: Oracle Solaris 11: In this release, you can migrate data from an old file system to a new file system while simultaneously allowing access and modification of the new file system during the migration process.

  Setting the shadow property on a new ZFS file system triggers the migration of the older data. The shadow property can be set to migrate data from the local system or a remote system with either of the following values:

  file:///path nfs://host:path

• Question 167:

  Identify the Automated Installer's (AI) equivalent to jumpStart's finish scripts and sysidcfg files.

  A. Manifest files

  B. SMF system configuration profile files

  C. Installadm create - client

  D. IPS software package repository

  E. installadm create-service

  F. svccfg - s application/pkg/server setprop sysidcfg

  Correct Answer: B

  Comparing sysidcfg File Keywords to System Configuration Profile Directives The following table compares sysidcfg file keywords with example AI system configuration profile specifications.

  sysidcfg File Keyword System Configuration Profile Directives

  Etc.

• Question 168:

  In Oracle Solaris 11, where is the Oracle default repository located?

  A. /var/spool/pkg

  B. http://localhost/solaris

  C. http://pkg.oracle.com/solaris/release

  D. http://www.oracle.com/Solaris/download

  E. /cdrom/cdrom0

  Correct Answer: C

  REPOSITORY DESCRIPTION

  *

  http://pkg.oracle.com/solaris/release The default repository for new Oracle Solaris 11 users. This repository receives updates for each new release of Oracle Solaris. Significant bug fixes, security updates, and new software may be provided at any time for users to install at Oracle's discretion.

  *https://pkg.oracle.com/solaris/support

  Provides bug fixes and updates. Accessible with a current support contract from Oracle.

  *

  https://pkg.oracle.com/solaris/dev Provides the latest development updates. Accessible to users enrolled in the Oracle Solaris 11 Platinum Customer Program and approved Oracle Partners.

• Question 169:

  Identify the correctly matching pair of equivalent functionality of JumpStart and Automated installer (AI).

  A. JumpStart: begin script AI: package repository

  B. JumpStart: setup_serverAI: installadm create-service

  C. JumpStart: add_Install_clientAI: SMF system configuration profile files

  D. JumpStart: finish scripts and sysidsfg filesAI: manifest files

  Correct Answer: B

  JumpStart: Use the setup_install_server(1M) command. AI: Use the installadm create-service command.

• Question 170:

  Identify three differences between the shutdown and init commands.

  A. Only shutdown broadcasts a final shutdown warning to all logged-in users.

  B. init does not terminate all services normally. The shutdown command performs a cleaner shutdown of all services.

  C. The shutdown command can only bring the system to the single-user milestone. The init command must be used to shut the system down to run level 0.

  D. Only shutdown sends a shutdown message to any systems that are mounting resources from the system that is being shut down.

  E. The shutdown command will shut the system down and turn off power; init will only shut the system down.

  Correct Answer: ABE