Oracle Database Administration II (1Z0-083)

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Vendor

Oracle

Certification

Database

Content

181 Qs

Status

Verified

Updated

1 day ago

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Exam Overview

The Oracle Database Administration II (1Z0-083) certification is a pivotal credential for database professionals aiming to master advanced Oracle Database 19c administration. This exam validates your expertise in critical areas such as backup and recovery using RMAN, performance tuning, high availability solutions like Oracle Data Guard, and managing the multitenant architecture. Achieving this certification demonstrates a deep understanding of complex database operations, troubleshooting, and security best practices, distinguishing you as a highly competent Oracle DBA. It significantly enhances career prospects, opening doors to senior roles and solidifying your position as an invaluable asset capable of ensuring the reliability, performance, and security of enterprise-level Oracle database systems.

Questions

65-75

Passing Score

600/1000

Duration

120 Minutes

Difficulty

Expert

Level

Professional

Skills Measured

Oracle Database Architecture and Multitenant Administration
Backup, Recovery, and Data Protection Strategies
Performance Management and SQL Tuning
High Availability and Disaster Recovery Solutions
Database Security and Auditing

Career Path

Target Roles

Senior Oracle Database Administrator Database Architect Database Consultant

Common Questions

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Previewing updated 1Z0-083 bank (37 Questions).

QUESTION 1

Examine these queries and their output:

After a system crash, an instance restart and an attempted opening of the PDBs result in:

[Image Failed]

Which two are true? (Choose two.)

A
Data file 24 can be recovered while PDB2 is opened.
B
Data file 24 must be recovered while the CDB is opened.
C
Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.
D
Data file 24 cannot be recovered while the CDB is opened.
E
Data file 24 must be recovered while PDB2 is closed.

Correct Option:

QUESTION 2

Which two are true about gathering optimizer statistics? (Choose two.)

A
Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open PDBs except PDB$SEED.
B
Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to a PDB opened in read/write mode gathers object statistics for that PDB.
C
Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics only in CDB$ROOT.
D
System statistics can be gathered only while connected to CDB$ROOT.
E
Executing DBMS_STATS.GATHER_DATABASE_STATS while connected to CDB$ROOT gathers object statistics in all open pluggable databases (PDBs)

Correct Option:

QUESTION 3

Which two are true about Oracle Flashback features? (Choose two.)

A
FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
B
FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.
C
FLASHBACK TABLE can undrop a column.
D
FLASHBACK DROP can undrop an index when undropping a table.
E
After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.

Correct Option:

QUESTION 4

Which three are true about requirements for various FLASHBACK operations? (Choose three.)

A
FLASHBACK transaction query requires undo to retrieve all versions of a row that existed between two points in time.
B
FLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.
C
FLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.
D
FLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.
E
FLASHBACK drop requires undo to retrieve all versions of a row that existed between two points in time.
F
FLASHBACK version query requires undo to retrieve all versions of a row that existed between two points in time.

Correct Option:

QUESTION 5

For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (Choose two.)

A
to specify a default tablespace in a PDB cloned from another PDB in the same CDB.
B
to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB
C
to include specific user tablespaces only when relocating a PDB
D
to specify the list of user tablespaces to include when moving a non-CDB to a PDB
E
to exclude a temp tablespace when plugging in a PDB
F
to specify the list of tablespaces to include when creating a PDB from the CDB seed

Correct Option:

QUESTION 6

While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN) incremental level 0 backup is a bottleneck.

FORCE LOGGING is enabled for the database.

Which two could improve read performance? (Choose two.)

A
Increase the size of tape I/O buffers.
B
Disable FORCE LOGGING for the database.
C
Increase the size of the database buffer cache.
D
Enable asynchronous disk I/O.
E
Increase the level of RMAN multiplexing.

Correct Option:

QUESTION 7

Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)

A
All metrics are instance related.
B
Cleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.
C
A space usage management alert is automatically cleared after the underlying problem is resolved.
D
They are generated by SMON when a tablespace is 97% full.
E
Metrics are statistical counts for a specific unit.
F
STATISTICS_LEVEL must be set to ALL to generate alerts.

Correct Option:

QUESTION 8

Which three actions are performed by the Oracle Preinstallation RPM, oracle-database-server-xxxx-preinstall, for Oracle Grid Infrastructure, where xxxx is the Oracle version and release? (Choose three.)

A
performing checks to ensure minimum configuration requirements for Oracle Grid Infrastructure are met
B
creating the oracle OS user
C
creating the OSDBA (dba) group
D
creating the oraInventory (oinstall) group
E
creating the grid OS user
F
configuring the OS for Oracle Automatic Storage Management shared storage access

Correct Option:

QUESTION 9

Which two are true about common objects? (Choose two.)

A
They can be created only in CDB$ROOT.
B
They can be only metadata-linked in an application container.
C
They can exist in user-defined schemas only in application containers.
D
They can exist in CDB$ROOT and an application root.
E
They can be extended data-linked in CDB$ROOT.
F
They can be created only in an application root.

Correct Option:

QUESTION 10

Which two are true about the Automatic Database Diagnostic Monitor (ADDM)? (Choose two.)

A
It analyzes a period of time corresponding to the 12 hours of activity.
B
It runs automatically after each AWR snapshot.
C
A DBA can run it manually.
D
Results are written to the alert log.
E
It analyzes a period of time corresponding to the last day of activity.

Correct Option:

QUESTION 11

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

A
Stateful alerts must be created by a DBA after resolving the problem.
B
Stateless alerts can be purged manually from the alert history.
C
Stateless alerts can be cleared manually.
D
Stateless alerts are automatically cleared.
E
Stateful alerts are purged automatically from the alert history.

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QUESTION 12

Which three are located by using environment variables? (Choose three.)

A
the Optimal Flexible Architecture (OFA) compliant path to store Oracle software and configuration files.
B
the location of Oracle Net Services configuration files
C
the list of a disk group names to be mounted by an Oracle Automatic Storage Management (ASM) instance at startup
D
default directories for temporary files used by temporary tablespaces
E
the temporary disk space used by Oracle Installer during installation
F
the maximum number of database files that can be opened by a database instance

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QUESTION 13

Which two are true about the character sets used in an Oracle database? (Choose two.)

A
Single-byte character sets provide better performance than multibyte character sets.
B
Unicode enables information from any language to be stored using a single character set.
C
Unicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).
D
Single-byte character sets always use 7-bit encoding schemes.
E
Multibyte character sets allow more efficient space utilization than single byte character sets.
F
Single-byte character sets always use 8-bit encoding schemes.

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QUESTION 14

Which four are true about duplicating a database using Recovery Manager (RMAN)? (Choose four.)

A
Duplication can be done by having the auxiliary database instance pull backup sets from the target database instance.
B
A connection to an auxiliary instance is always required.
C
A subset of the target database can be duplicated.
D
A new DBID is always created for the duplicated database.
E
A connection to the recovery catalog instance is always required.
F
A backup of the target database is always required.
G
Duplication can be done by having the target database instance push copies to the auxiliary database instance.
H
A connection to the target database instance is always required.

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QUESTION 15

A user complains about poor database performance.

You want to verify if the user's session has waited for certain types of I/O activity.

Which view displays all waits waited on by a session at least once?

A
V$SESSION_EVENT
B
V$SESSTAT
C
V$SESSION_WAIT
D
V$SESSION_WAIT_CLASS
E
V$SESSION

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QUESTION 16

You must transport the UNIVERSITY tablespace from one database to another.

The UNIVERSITY tablespace is currently open read/write.

The source and destination platforms have different endian formats.

Examine this list of actions:

1. Make the UNIVERSITY tablespace read-only on the source system.

2. Export the UNIVERSITY tablespace metadata using EXPDP.

3. Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the source system.

4. Copy the UNIVERSITY tablespace data files to the destination system.

5. Copy the Data Pump dump set to the destination system.

6. Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination system.

7. Import the UNIVERSITY tablespace metadata using IMPDP.

8. Make the UNIVERSITY tablespace read/write on the destination system.

Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?

A
1, 2, 4, 5, 7, 8
B
1, 2, 4, 6, 7, 8
C
1, 2, 3, 4, 5, 7, 8
D
1, 2, 3, 4, 5, 6, 7, 8
E
2, 4, 5, 6, 7

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QUESTION 17

Which three are true about Optimizer Statistics Advisor? (Choose three.)

A
It can be run only manually.
B
It is part of the DBMS_ADVISOR package.
C
It can recommend changes to improve the statistics gathering process.
D
It always analyzes all schemas in the database.
E
It runs automatically every night by default.
F
It is part of the DBMS_STATS package.

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QUESTION 18

You issued this command:

RMAN> BACKUP RECOVERY FILES;

Which two are true? (Choose two.)

A
All Oracle recovery files not in the current FRA that have not been backed up already, are backed up.
B
All non-Oracle files in the current FRA that have not been backed up already, are backed up.
C
All Oracle recovery files in the current FRA that have not been backed up already, are backed up.
D
All Oracle recovery files in the current fast recovery area (FRA) are backed up.
E
These backups can be written to disk or SBT.

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QUESTION 19

Which three are true about monitoring waits for sessions and services? (Choose three.)

A
V$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.
B
V$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.
C
V$SESSION_WAIT_CLASS displays waits broken down by wait class only for waiting sessions.
D
V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
E
V$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.
F
V$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.

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QUESTION 20

Which three are true about transporting databases across platforms using Recovery Manager (RMAN) image copies? (Choose three.)

A
By default, the transported database will use Oracle Managed Files (OMF)
B
Data files can be converted on the destination system.
C
Data files can be converted on the source system.
D
A new DBID is automatically created for the transported database.
E
Databases can be transported between systems with different endian formats.
F
The password file is automatically converted by RMAN.

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QUESTION 21

Examine this command:

$ rhpctl move database `"sourcehome Oracle_home_path `"destinationhome Oracle_home_path

For which two purposes can you use this command? (Choose two.)

A
to switch an existing Oracle Database home to a newer release of Oracle software on the same server
B
to switch to a read-only Oracle home
C
to switch back to the previous Oracle home as part of a rollback operation
D
to switch the Oracle Database home when using a centralized Rapid Home Provisioning server
E
to switch to a patched Oracle Database home

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QUESTION 22

Which three are true about opatchauto? (Choose three.)

A
It performs a shutdown and then a restart of all processes in both Oracle Grid Infrastructure and Oracle Database home during the patching process.
B
It must be invoked by a user with root user privileges.
C
Patches are applied via opatchauto.
D
Users must always input patch plans to opatchauto.
E
It requires the Oracle Grid Infrastructure and Oracle Database instances to be shut down before being invoked.
F
It applies patches in nonrolling mode by default.
G
It is used to apply interim patches to Oracle Grid Infrastructure and Oracle Database home combinations.

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QUESTION 23

Examine this output:

Which two are true? (Choose two.)

A
Any PDB not specified in the plan will be unable to execute statements in parallel.
B
PDB3 can use all available parallel execution processes at times.
C
PDB1 is always limited to 40% of the available system resources regardless of demand.
D
Any PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.
E
PDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.
F
PDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.

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QUESTION 24

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

A
orainstRoot.sh can be executed automatically by the Database installer by using sudo or root credentials.
B
root.sh can be executed automatically by the Database Installer only if it is provided with root credentials.
C
The sudo password can be specified in a response file.
D
root.sh can be executed automatically by the Database installer only by using sudo credentials.
E
The sudo password must be specified in a response file.
F
The root password cannot be specified in a response file.

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QUESTION 25

Automatic Shared Memory Management is disabled for one of your database instances.

Some SQL statements perform poorly due to excessive hard parse activity, thereby degrading performance.

What would be your next step?

A
Run the SQL Access Advisor.
B
Run the Memory Advisor for the shared pool.
C
Run the SQL Tuning Advisor.
D
Run the Memory Advisor for the Program Global Area.
E
Run the Memory Advisor for the System Global Area.

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QUESTION 26

Which two are true about flashback features in Oracle Database 19c and later releases? (Choose two.)

A
Flashback logs are automatically purged when DB_FLASHBACK_RETENTION_TARGET is set lower than the time they have already been retained.
B
Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET only after there is space pressure.
C
Flashback logs are monitored and proactively deleted when beyond the retention period defined in DB_FLASHBACK_RETENTION_TARGET before there is space pressure.
D
Flashback logs are monitored for being older than the retention period defined in DB_FLASHBACK_RETENTION_TARGET and can be deleted by an administrator written event trigger.
E
Flashback logs are automatically purged whenever the value of DB_FLASHBACK_RETENTION_TARGET is changed.

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QUESTION 27

Which two are true about RMAN duplexed backup sets? (Choose two.)

A
A duplexed backup set uses the same number of SBT channels as a non-duplexed backup set for the same number of files.
B
A non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk.
C
A non-duplexed backup set written to SBT can be duplexed to tape by backing up the backup set that is already on tape.
D
A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk.
E
A non-duplexed backup set written to SBT can be duplexed to disk by backing up the backup set that is already on tape.
F
A duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.

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QUESTION 28

You are managing this configuration:

1. CDB1 is a container database.

2. PDB1 and PDB2 are two pluggable databases in CDB1.

3. USER1.EMP is a table in PDB1 and USER2.DEPT is a table in PDB2.

CDB1 user SYS executes these commands after connecting successfully to PDB2:

Which two are true? (Choose two.)

A
The inserts on USER1.EMP remain uncommitted when the session connected to PDB2.
B
The inserts on USER1.EMP were committed when the session inserted a row into USER2.DEPT.
C
The insert on USER2.DEPT fails because of the active transaction in the parent container.
D
The insert on USER2.DEPT is a recursive autonomous transaction by the child session and is committed.
E
The inserts on USER1.EMP were rolled back when the session connected to PDB2.
F
The insert on USER2.DEPT is uncommitted.
G
The inserts on USER1.EMP were committed when the session connected to PDB2.

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QUESTION 29

Which two are true about changing the LOCAL_UNDO_ENABLED property to false in a CDB? (Choose two.)

A
After the change, only a common user with the required privilege can create an undo tablespace in CDB&ROOT.
B
Any new PDB and existing PDBs are automatically configured to use the default undo tablespace in CDB$ROOT.
C
After the change, only one undo tablespace can exist in CDB$ROOT.
D
After the change, any user with the required privilege can create an undo tablespace in the PDBs.
E
Undo tablespaces existing in PDBs must be dropped before the change.
F
After the change, each existing PDB has to be reopened for the new undo mode to take effect.

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QUESTION 30

Examine this configuration:

1. CDB1 is a container database.

2. PDB1 and PDB2 are pluggable databases in CDB1.

3. PDB1 and PDB2 are OPEN in READ WRITE mode.

You execute these commands successfully:

Which two are true? (Choose two.)

A
Uncommitted transactions in PDB1 have been rolled back.
B
PDB1 is closed.
C
Uncommitted transactions in CDB1 and PDB1 have been rolled back.
D
CDB1 is shut down.
E
CDB1 is in MOUNT state

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QUESTION 31

Which three actions are performed by Database Upgrade Assistant (DBUA)? (Choose three.)

A
It recompiles all stored PL/SQL code by using utlrp.sql.
B
It empties the RECYCLE BIN.
C
It performs prerequisite checks to verify if the Oracle database is ready for upgrade.
D
It sets all user tablespaces to ג€read-onlyג€ before starting the upgrade.
E
It removes the AUDSYS schema and the AUDIT_ADMIN and AUDIT_VIEWER roles
F
It increases tablespace size, if required, to meet upgrade requirements.

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QUESTION 32

A container database (CDB) contains two pluggable databases PDB1 and PDB2.

The LOCAL_UNDO_ENABLED database property is set to FALSE in the CDB.

Data file 24 of PDB2 was deleted and you need to restore and recover it.

The only RMAN backup that exists was created with the BACKUP DATABASE command while connected to CDB$ROOT.

Which three are true? (Choose three.)

A
Data file 24 can be recovered only while connected to PDB2.
B
Data file 24 can be restored and recovered while connected to CDB$ROOT.
C
Data file 24 can be restored only while connected to CDB$ROOT.
D
Data file 24 can be restored only while connected to PDB2.
E
Data file 24 can be recovered while connected to PDB2.
F
Data file 24 can be recovered while connected to CDB$ROOT.

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QUESTION 33

Which three are true? (Choose three.)

A
Virtual Private Database (VPD) policies on objects in an application root are automatically synchronized with all application PDBs contained in the application container.
B
Application-common TSDP policies are always container specific.
C
Application-common Transparent Security Data Protection (TSDP) policies can be created only within an application install/patch BEGIN-END block.
D
Application-common Oracle Label Security (OLS) policies cannot be created in an application root outside an install/patch BEGIN-END block.
E
Fine-grained auditing (FGA) policies in an application root are automatically synchronized to all application PDBs contained in the application container.
F
Application-common OLS policies can be created in an application root inside an install/patch BEGIN-END block.
G
Unified auditing can be automatically synchronized to all application PDBs in an application container.

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QUESTION 34

Which three are true about performing an Oracle Database install on Linux? (Choose three.)

A
The runfixup.sh script can install missing RPMs.
B
The Oracle Preinstallation RPM must be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
C
It allows you to select the languages supported by the Oracle database server.
D
It can be done before installing Grid Infrastructure for a Standalone Server.
E
The Oracle Preinstallation RPM can be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.
F
It can be done after installing Grid Infrastructure for a Standalone Server.
G
The Oracle database administrator must be granted access to the root operating system account to tun root privileged scripts.

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QUESTION 35

Which three can be done using Oracle Database Configuration Assistant (DBCA) starting from Oracle Database 19c? (Choose three.)

A
cloning a remote container database in interactive mode
B
cloning a remote pluggable database in silent mode
C
relocating a remote pluggable database in interactive mode
D
relocating a remote container database in silent mode
E
cloning a remote container database in silent mode
F
relocating a remote pluggable database in silent mode
G
relocating a remote container database in interactive mode

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QUESTION 36

A database is configured in ARCHIVELOG mode.

Full RMAN backups are taken daily and no backup to trace has been taken of the control file.

A media failure has occurred.

In which two scenarios is complete recovery possible? (Choose two.)

A
when any archived log from, before, or after the most recent backup is corrupt.
B
after losing all copies of the control file
C
after losing an archived log from after the most recent backup
D
after losing an archived log from before the most recent backup
E
after losing the SYSTEM tablespace

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QUESTION 37

Which three are true about Database Point-in-Time Recovery? (Choose three.)

A
The database must have FLASHBACK DATABASE ON to perform Database Point-in-Time Recovery.
B
The database must be in MOUNT state when performing Database Point-in-Time Recovery.
C
Database Point-in-Time Recovery is performed by the Managed Recovery Process (MRP)
D
The Database must be in ARCHIVELOG mode.
E
The target point for the recovery must be specified as a stime or System Change Number (SCN).
F
The database must be open RESETLOGS after Database Point-in-Time Recovery.

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