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Oracle 1Z0-821 Exam

Certification Provider: Oracle
Exam Name: Solaris 11 System Administration
Duration: 150 Minutes
Number of questions in our database: 243
Exam Version: May. 21, 2023
1Z0-821 Exam Official Topics:
  • Topic 1: Troubleshoot zone and resource utilization issues/ Explain key user management concepts
  • Topic 2: Troubleshoot user account and quota issues/ Troubleshoot service and boot issues
  • Topic 3: Managing System Processes and Scheduling System Tasks/ Verify the operating system installation
  • Topic 4: Troubleshoot access and authentication issues/ Plan for an Oracle Solaris 11 operating system installation
  • Topic 5: Determine the current zones configuration and resource utilization on the system/ Installing Oracle Solaris 11 using an Interactive Installer
  • Topic 6: Troubleshoot file systems and storage issues/ Setting Up and Administering User Accounts
  • Topic 7: Explain basic networking concepts/ Troubleshoot installation issues
  • Topic 8: Explain the role of the Service Management Facility (SMF)/ Install the Oracle Solaris 11 operating system by using an interactive installer
  • Topic 9: Administer ZFS Snapshots and Clones/ Administer an Oracle Solaris zone/ Schedule system administration tasks
  • Topic 10: Troubleshoot software update issues/ Update the Oracle Solaris 11 operating system by using IPS
  • Topic 11: Managing password algoritgms/ Manage user initialization files/ Setting Up and Administering Data Storage

Free Oracle 1Z0-821 Exam Actual Questions

The questions for 1Z0-821 were last updated On May. 21, 2023

Question #1

You are going to create live zones on you server. Disk space is critical on this server so you need to reduce the amount of disk space required for these zones. Much of the data required for each of these zones is identical, so you want to eliminate the duplicate copies of data and store only data that is unique to each zone.

Which two options provide a solution for eliminating the duplicate copies of data that is common between all of these zones?

Reveal Solution Hide Solution
Correct Answer: D, E

n Oracle Solaris 11, you can use the deduplication (dedup) property to remove redundant data from your ZFS file systems. If a file system has the dedup property enabled, duplicate data blocks are removed synchronously. The result is that only unique data is stored, and common components are shared between files.

Question #2

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?

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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:


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:



Question #3

You run the command dlstat show-link -r.

Select the two correct statements regarding the information displayed in the INTRS column.

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Correct Answer: C, E

In this output, the statistics for interrupt (INTRS) are significant. Low interrupt numbers indicate greater efficiency in performance. If the interrupt numbers are high, then you might need to add more resources to the specific link.


# dlstat -r -i 1


e1000g0 101.91K 32.86M 87.56K 14.35K 3.70K 205 5

nxge1 9.61M 14.47G 5.79M 3.82M 379.98K 85.66K 1.64K

vnic1 8 336 0 0 0 0 0

e1000g0 0 0 0 0 0 0 0

nxge1 82.13K 123.69M 50.00K 32.13K 3.17K 724 24

vnic1 0 0 0 0 0 0 0

Note: dlstat show-link [-r [-F] | -t] [-i interval] [-a] [-p] [ -o field[, ...]] [-u R|K|M|G|T|P] [link]

Display statistics for a link.


Display receive-side statistics only. Includes bytes and packets received, hardware and software drops, and so forth.

List of supported RX fields:







hdrops: hardware drops

sdrops: software drops (owing to bandwidth enforcement)

ch<10: number of packet chains of length < 10

ch10-50: number of packet chains of length between 10 and 50

ch>50: number of packet chains of length > 50

Question #4

Examine this command and its output:

$ zfs list -r -t all tank


tank 2.41G 2.43G 32K /tank

tank/database 2.41G 2.43G 2.41G /tank/database

tank/[email protected] 20K - 2.00G --

Next you execute:

# zfs destroy tank/database

Which statement is true about the result of executing this command?

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Correct Answer: C

Question #5

Examine this command and its output:

# zoneadm list



Which two outcomes can be deduced from this output?

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Correct Answer: B, C

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