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To prepare for the Oracle 1Z0-083 exam, candidates are recommended to have extensive hands-on experience in managing Oracle databases. They are also advised to undergo formal training from Oracle or other authorized training providers to gain a comprehensive understanding of the exam topics. With the right preparation, candidates can pass the Oracle 1Z0-083 exam and become certified Oracle database administrators, which can greatly enhance their career prospects in the IT industry.

Achieving the Oracle 1Z0-083 certification is a significant achievement for database administrators, as it demonstrates their knowledge and skills in managing Oracle databases. It can also lead to career advancement opportunities, as employers often seek certified professionals to manage their critical database systems. Oracle Database Administration II certification is valid for three years, after which candidates can renew their certification by passing a recertification exam or by earning a different Oracle certification.

NEW QUESTION 10
Choose the best answer. Which operating system group is NOT needed to perform an Oracle Database installation?

OSASM

OSRACDBA

OSKMDBA

OSDBA

OSOPER

NEW QUESTION 11
Which two are true about Recovery Manager (RMAN) diagnostic message output? (Choose two.)

Media Management messages for SBT devices are always written to sbtio.log.

RMAN error stacks should be read from the bottom up as that is the order in which errors are generated.

RMAN error stacks should be read from the top down as that is the order in which errors are generated.

The RMAN LOG command line clause causes output issued during RMAN command compilation to be written to a log file and to standard output.

The RMAN LOG command line clause causes output issued during RMAN command compilation to be written to a log file only.

Media Management messages for SBT devices are written to an Oracle trace file.

NEW QUESTION 12
Which two are true about server-generated alerts? (Choose two.)

Stateful alerts must be created by a DBA after resolving the problem.

Stateless alerts can be purged manually from the alert history.

Stateless alerts can be cleared manually.

Stateless alerts are automatically cleared.

Stateful alerts are purged automatically from the alert history.

NEW QUESTION 13
Choose two. Which two are true about diagnosing Oracle Database failure situations using Data Recovery Advisor?

Data Recovery Advisor can proactively check for failures.

Using the Data Recovery Advisor LIST FAILURE command always requires that the database for which failures are to be listed is in MOUNT state.

ata Recovery Advisor can be used if a database is in the NOMOUNT state.

A failure can be closed only if the database is in MOUNT state.

Data Recovery Advisor can be used if a database is closed.

NEW QUESTION 14
Choose three. Which three are true about the tools for diagnosing Oracle Database failure situations?

RMAN can always repair corrupt blocks.

Flashback commands help with repairing physical errors.

The ADR can store metadata in an Oracle Database repository.

The Automatic Diagnostic Repository (ADR) has a separate home directory for each instance of each Oracle product that is installed and uses it.

The ADR command-line utility (ADRCI) can package incident information to send to Oracle Support.

The Data Recovery Advisor uses the ADR.

NEW QUESTION 15
You have configured RMAN SBT channels to write backups to media.
You then take an RMAN backup by using this command:

Which three are true? (Choose three.)

The restore point is a label for the system change number (SCN) that will be saved two years after the archival backup was taken.

The data file backups in the self-contained archive backup are not considered obsolete for two years regardless of the retention policy.

All archive logs created after this backup are kept for two years.

The SPFILE is included in the self-contaied archival backup.

The control file is included in the self-contained archival backup.

The restore point is a label for the system change number (SCN) before the archival backup was taken.

NEW QUESTION 16
Examine this configuration:
1. CDB1is an Oracle Database 12c Release 2 database containing pluggable databases PDB$SEED, PDB1, and PDB2.
2. PDB$SEEDis open READ ONLY
3. PDB1is open READ WRITE
4. PDB2 is MOUNTED.
5. ORACLE_HOMEis /u01/app/oracle/product/18.1.0/dbhome_1.
You execute these commands before upgrading the database to the current release:

For which databases will fixup scripts be created?

CDB1, PDB$SEED, PDB1, and PDB2

PDB$SEED, PDB1, and PDB2only

CDB1and PDB$SEEDonly

CDB1, PDB1, and PDB2only

CDB1, PDB$SEED, and PDB1 only

NEW QUESTION 17
Which four are true about RMAN backup sets?

A backup set must be written to media.

Blocks from multiple data files can be contained in one backup set.

A backup set must be written to disk.

Blocks from multiple data files can be contained in one backup piece.

A data file can be split into multiple sections stored in different backup sets.

A backup piece can belong to only one backup set.

A backup set can contain only one backup piece.

A data file can be split into multiple sections stored in different backup pieces in the same backup set.

NEW QUESTION 18
Which two are true about RMAN backups when using a media manager to write backups to tape when there are only two tape drives? (Choose two.)

SBT tape compression can be used even if no RMAN compression is configured.

Any backup set written to the SBT device in this configuration can contain a maximum of two backup pieces.

Any backup written to the SBT device in this configuration can contain a maximum of two backup sets.

SBT tape compression and RMAN backup compression should be used in parallel.

The SBT device should be configured to use PARALLELISM 2 to allow both tape drive to be used simultaneously.

NEW QUESTION 19
Choose three. Which three are true about the tools for diagnosing Oracle Database failure situations?

RMAN can always repair corrupt blocks.

Flashback commands help with repairing physical errors.

The ADR can store metadata in an Oracle Database repository.

The Automatic Diagnostic Repository (ADR) has a separate home directory for each instance of each Oracle product that is installed and uses it.

The ADR command-line utility (ADRCI) can package incident information to send to Oracle Support.

The Data Recovery Advisor uses the ADR.

NEW QUESTION 20
Which two are true about instance recovery?

It is performed automatically after the database is opened; however, blocks requiring recovery are not available until they are recovered.

It is performed by the Recovery Writer (rvwr) background process.

It is performed automatically while the database remains in mount state. Then the database is opened.

Setting fast_start_mttr_target to a lower value reduces instance recovery time by causing dirty buffers to be written to disk more frequently, thereby reducing the number of I/Os needed during instance recovery.

It is not possible if an archived log is missing.

Setting fast_start_mttr_target to a higher value reduces instance recovery time by causing the log writer to write more frequently, thereby reducing the number of I/Os needed during instance recovery.

NEW QUESTION 21
You are working on an Oracle Database 19c database. You enabled the Flashback Database feature. Which two statements regarding flashback logs are true? (Choose two.)

Flashback logs are not archived.

Flashback logs are maintained in redo log files.

Flashback logs are maintained in the Flash Recovery Area.

Flashback logs are used to maintain Flashback Database related errors.

Flashback logs need to be cleared manually after you disable Flashback Database.

NEW QUESTION 22
Which three are true about requirements for various flashback operations?

flashback version query requires undo to retrieve all versions of a row that existed between two points in time.

flashback drop requires that the recyclebin parameter be set to on.

flashback data archive requires undo to store all versions of all rows of a table being tracked.

flashback transaction query requires undo to retrieve all versions of a row that existed between two points in time.

flashback drop requires undo to retrieve all versions of a row that existed between two points in time.

flashback version query requires that the recyclebin parameter be set to on.

NEW QUESTION 23
Which two are true about reclaiming space used by Flashback logs in Oracle Database 19c and later releases? (Choose two.)

Space is always reclaimed automatically when the retention period for Flashback logs is lowered.

Space might be reclaimed proactively before space pressure occurs.

Space might be reclaimed automatically when the retention period for Flashback logs is lowered.

Space is only reclaimed when there is space pressure in the Fast Recovery Area. (FRA)

Space is always reclaimed proactively before space pressure occurs.

NEW QUESTION 24
Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed: Which three are true? (Choose three.)

Application PDBsthat are subsequently created in the APP1 application container will be cloned from APP1$SEED.

An application seed PDB is created for APP1.

An application root PDB is created for APP1.

A default service is created for the application root APP1.

Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.

APP1 can never be unplugged.

NEW QUESTION 25
choose four Which four are true about performance-related Oracle tools?

The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two consecutive periods.

SQL Performance Analyzer can suggest schema changes.

SQL Performance Analyzer can identify regressed SQL statements.

Database Replay always uses one replay client for all the original database sessions.

Database Replay always uses one replay client for each original database session.

The Automatic Database Diagnostic Monitor (ADDM) Compare Period report can compare two non-consecutive periods.

The Active Session History (ASH) report is based on wait event samples.

NEW QUESTION 26
Choose the best answer. How do you configure a CDB for local undo mode?

Open the CDB instance in restricted mode. In CDB$ROOT, drop the UNDO tablespace. Execute ALTER DATABASE LOCAL UNDO ON in each PDB, and then restart the CDB instance.

Open the CDB instance in upgrade mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then restart the CDB instance.

Open the CDB instance in upgrade mode. In each PDB, execute ALTER DATABASE LOCAL UNDO ON, create an UNDO tablespace, and then restart the CDB instance.

Open the CDB instance in restricted mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON. create an UNDO tablespace in each PDB, and then restart the CDB instance.

Open the CDB in read-only mode. In CDB$ROOT, execute ALTER DATABASE LOCAL UNDO ON, and then change the CDB to read/write mode.

NEW QUESTION 27
Which three are true about RMAN persistent configuration settings, administration, and their effects? (Choose three.)

A target database’s persistent RMAN configuration settings are always stored in the target’s control file

Backup older than the recovery window retention policy are always deleted automatically if the backup location has insufficient space.

Backups written to the fast recovery area (FRA) that are oboslete based on the redundancy retention policy can be deleted automatically to free space.

The RMAN SHOW ALL command displays only settings with nondefault values.

A target database’s persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.

The V$RMAN_CONFIGURATION view displays only settings with values that have been modified.

A DBA must specify either a redundancy retention policy or a recovery window retention policy.

NEW QUESTION 28
Which three are true in Oracle 19c and later releases? (Choose three.)

If the password file location changes, then the new location is used automatically by the Oracle Server.

Schema Only accounts can be granted administrator privileges.

All the Oracle-supplied accounts are Schema Only accounts.

Privilege Analysis is included in Oracle Enterprise Edition and no longer requires Database Vault.

Unified Auditing can be configured to audit only events that are issued indirectly by an audited user.

Unified Auditing can be configured to audit only events that are issued directly by an audited user.

NEW QUESTION 29
Choose two. Which two are true about the execution of operating system scripts starting from Oracle Database 19c?

The root password cannot be specified in a response file.

The sudo password must be specified in a response file.

orainstRoot.sh can be executed automatically by the Database installer by using sudo or root credentials.

root.sh can be executed automatically by the Database installer only if it is provided with root credentials.

root.sh can be executed automatically by the Database installer only by using sudo credentials.

NEW QUESTION 30
Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process?

By default, MMON creates an AWR snapshot every 30 minutes.

By default, AWR snapshots are automatically purged after eight days.

ADDM can recommend shrinking the buffer cache.

ADDM can recommend extending the buffer cache.

ADDM performs its analysis only when a DBA requests it.

AWR snapshots must be deleted when no longer required by ADDM.

NEW QUESTION 31
Choose two. A database is configured in ARCHIVELOG mode. A full RMAN backup exists but no control file backup to trace has been taken. A media failure has occurred. In which two scenarios is incomplete recovery required?

after losing all members of the CURRENT online redo log group

after losing all copies of the control file

after losing an UNDO tablespace that is in use

after losing all members of an INACTIVE online redo log group

after losing a SYSAUX tablespace data file

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