Free Oracle 1Z0-820 Exam Questions

Become Oracle Certified with updated 1Z0-820 exam questions and correct answers

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Total 135 Questions | Updated On: Feb 20, 2026

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Question 1

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 < blocksize > option with the zfs create command and increase the value of < blocksize >

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

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

Answer: A

Question 2

View the Exhibit and review the zpool and ZFS configuration information from your system.

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Identify the correct procedure for breaking the /prod_data mirror, removing c4tOdO and c4t2d0, and making the data on c4t0d0 and c4t2d0 accessible under the /dev_data mount point

A : zpool split pooll pool2 c4t0d0 c4t2d0 zpool import pool2 zfs set mountpomt=/dev_data pool2/prod_data

B : zpool detach pooh pool2 zpool attach pool2 zfs set mountpoint=/dev_data pool2/prod_data

C : zfs split pool1/prod_data -n pool2/dev_data zfs set mountpomt=/dev_data pool2/prod_data

D : zpool split pooh pool2 c4t0d0 c4t2d0 zpool import pool2

Answer: A

Question 3

A process associated with a user application keeps crashing on the user, but a core dump is not being saved in the /var/core/pprocess directory. The core dump configuration is:

global core file pattern: /var/core/core. %f.%p

global core file content: default

init core file pattern: core

init core file content: default

global core dumps: enabled

per-process core dumps: enabled

global setid core dumps disabled

per-process setid core dumps: disabled

global core dump logging: disabled

Which option would change the core dump configuration so that a user's per-process core dumps get saved in the /var/core/pprocess directory?

A : coreadm ---g /var/core/pprocess/core.%f %p

B : coreadm ---i /var/core/pprocess/core.%f.%p

C : coreadm ---i /var/core/pprocess/core.%f.%p coreadm ---e proc---setid ---d process

D : coreadm ---g /var/core/pprocess/core.%f.%p coreadm ---e global---setid

E : Make this change to the /etc/coreadm conf file:init core file pattern: /var/core/pprocess/core.%f.%p

Answer: A

Question 4

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

A : JumpStart: begin scriptAI: 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

Answer: B

Question 5

When setting up Automated Installer (AI) clients, an interactive tool can be used to generate a custom system configuration profile. The profile will specify the time zone, data and time, user and root accounts, and name services used for an AI client installation. This interactive tool will prompt you to enter the client information and an SC profile (XML) will be created.

Which interactive tool can be used to generate this question configuration?

A : sys-unconfig

B : installadm set-criteria

C : sysconfig create-profile

D : installadm create-profile

Answer: B

Page: 1 / 27

Total 135 Questions | Updated On: Feb 20, 2026

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