Oracle 1Z0-083 Study Guide Archives Updated on Jan 21, 2026 [Q30-Q53]

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Oracle 1Z0-083 Study Guide Archives Updated on Jan 21, 2026

Download 1Z0-083 Mock Test Study Material

NO.30 Which statement correctly describes the SQL profiling performed by the SQL Tuning Advisor?

It is a set of recommendations by the optimizer to create new indexes.

It is a set of recommendations by the optimizer to restructure a SQL statement to avoid suboptimal execution plans.

It is auxiliary information collected by the optimizer for a SQL statement to help use better joins orders.

It is auxiliary information collected by the optimizer for a SQL statement to eliminate estimation error.

It is a set of recommendations by the optimizer to change the access methods used.

NO.31 Which two statements are true when row archival management is enabled?

The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.

The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.

The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.

The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.

The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer considered active. Correct

NO.32 Which two are true about the Program Global Area (PGA) and its management in an Oracle database instance? (Choose two.)

The private SQL area (UGA) is located in the System Global Area (SGA) when using dedicated servers.

PGA_AGGREGATE_LIMIT is a hard limit on the PGA size for any one session.

The entire PGA is located in the System Global Area (SGA) when using shared servers.

Sorts and Hash Joins use PGA memory.

The private SQL area (UGA) is located in the System Global Area (SGA) when using shared servers.

NO.33 Which three are true about an application seed pluggable database (PDB)?

A new application PDB created by cloning an application seed PDB can have an up-to-date version of the application installed after cloning completes.

It is not required in an application container.

It cannot be dropped from its application container.

A new application PDB created by cloning an application seed PDB can have an old version of the application installed after cloning completes.

It is automatically synchronized with its application root PDB when an application is installed.

It Is automatically synchronized with its application root PDB when an application is upgraded.

It cannot be added to an application container after the application container has already been created.

NO.34 Which three are true about managing memory components in an Oracle database instance? (Choose three.)

With Automatic Shared Memory Management, the database instance can increase the Large Pool size by reducing the Shared Pool size.

With Automatic Memory Management, the database instance can increase the System Global Area size by reducing the Program Global Area size.

Automatically tuned and resized System Global Area components will always revert to their initial sizes after an instance restart.

Automatic Memory Management must be used together with locking the System Global Area into physical memory.

With Automatic Shared Memory Management, the database instance can increase the Program Global Area size by reducing the System Global Area size.

On Line Transaction Processing systems often use less Program Global Area than Decision Support Systems.

NO.35 Choose three. Which three are true about Oracle Restart?

It is used in both clustered and non-clustered environments.

You can add and remove components from an Oracle Restart configuration with Server Control (SRVCTL) commands.

It runs from the Oracle Grid Infrastructure home.

If you shut down a database instance with SQL*Plus, Oracle Restart interprets this as a database failure and attempts to restart the instance.

The Server Control (SRVCTL) utility can be used to start and stop Oracle Restart.

It can manage Oracle Database instances, Oracle Net Listeners, and Oracle Automatic Storage Management instances.

NO.36 Which three methods can be used for heap table data migration after upgrading a database? (Choose three.)

using Database Replay

using SQL Developer

using Oracle Data Pump

using operating system file copy utilities

using Database Upgrade Assistant

using the CREATE TABLE AS SELECT SQL statement

NO.37 Examine these queries and their output:

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

Which two are true? (Choose two.)

Data file 24 can be recovered while PDB2 is opened.

Data file 24 must be recovered while the CDB is opened.

Data file 24 can be recovered while CDB$ROOT and PDB$SEED are opened.

Data file 24 cannot be recovered while the CDB is opened.

Data file 24 must be recovered while PDB2 is closed.

NO.38 Your sales_root application container has two application PDBs.
The sales_app application has a common table, FIN.REVENUE, in the two PDBs.
Examine this query and its output:

Which two are true?

A container map exists for the revenue table, but Is not enabled.

The maptable table defines a logical partition key on a commonly used column for the revenue table.

The containers clause cannot be used in queries on the revenue table.

The revenue table partitions are not pruned across the PDBs automatically.

The maptable table is a metadata-linked table.

The revenue table must be a list-partitioned table.

NO.39 For which two requirements can you use the USER_TABLESPACEclause with the CREATE PLUGGABLE DATABASEcommand? (Choose two.)

to specify a default tablespace in a PDB cloned from another PDB in the same CDB.

to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB

to include specific user tablespaces only when relocating a PDB

to specify the list of user tablespaces to include when moving a non-CDB to a PDB

to exclude a temp tablespace when plugging in a PDB

to specify the list of tablespaces to include when creating a PDB from the CDB seed

NO.40 HR_ROOT is an application container with the HR_APP application installed.
No application PDBs and no application seed have yet been created in HR_ROOT.
An application PDB, PDB1, must be created so that the HR_APP application’s common objects are accessible to it.
Which two methods can be used? (Choose two.)

Create an application seed, and install HR_APP in it.

Create the PDB1 application PDB and install HR_APP in it.

Create an application seed, synchronize it with HR_ROOT, and then create the PDB1 application PDB.

Create the PBD1 application PDB and synchronize it with HR_ROOT.

Create the PBD1 application PDB and synchronize it with PDB$SEED.

NO.41 Which three are true about managing memory components in an Oracle database instance? (Choose three.)

With Automatic Shared Memory Management, the database instance can increase the Large Pool size by reducing the Shared Pool size.

With Automatic Memory Management, the database instance can increase the System Global Area size by reducing the Program Global Area size.

Automatically tuned and resized System Global Area components will always revert to their initial sizes after an instance restart.

Automatic Memory Management must be used together with locking the System Global Area into physical memory.

With Automatic Shared Memory Management, the database instance can increase the Program Global Area size by reducing the System Global Area size.

On Line Transaction Processing systems often use less Program Global Area than Decision Support Systems.

NO.42 Which two are true about Rapid Home Provisioning (RHP), which has been available since Orcale 18c?
(Choose two.)

It is an Oracle Database service

It cannot be used to upgrade Oracle Database homes.

It can be used to provision applications.

It can be used to patch Grid Infrastructure homes containing Oracle Restart.

It can be used to provision middleware.

NO.43 Which three are true about Optimizer Statistics Advisor? (Choose three.)

It can be run only manually.

It is part of the DBMS_ADVISOR package.

It can recommend changes to improve the statistics gathering process.

It always analyzes all schemas in the database.

It runs automatically every night by default.

It is part of the DBMS_STATS package.

NO.44 You take your database backups by using the RMAN media management interface (MMI).
Which two are true about the use of the RMAN MMI?

You can use it to create image copies for entire file systems.

You can use it to create image copies for database files.

You can use it to create backup sets for database files.

You can use it to create proxy copies for database files.

You can use it to create proxy copies for entire file systems.

NO.45 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.)

Increase the size of tape I/O buffers.

Disable FORCE LOGGING for the database.

Increase the size of the database buffer cache.

Enable asynchronous disk I/O.

Increase the level of RMAN multiplexing.

NO.46 Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:

Which three are true? (Choose three.)

Application PDBs that are subsequently created in the APP1application 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.

APP1can never be unplugged.

NO.47 choose three Which three are true about RMAN duplexed backup sets or image copies?

A backup set may be duplexed with both copies written to disk.

An image copy on disk can be copied to disk.

A backup set may be duplexed with both copies written to sbt.

A backup set may be duplexed so that one copy is written to sbt and the other to disk.

An image copy on disk can be copied to sbt.

An image copy on sbt can be copied to disk.

NO.48 How do you configure a CDB for local undo mode?

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

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

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.

NO.49 Which three are true about creating container databases (CDBs) and pluggable databases (PDBs) in Oracle 19c and later releases? (Choose three.)

A PDB snapshot can be a sparse copy of a source PDB.

A PDB snapshot depends on an existing storage snapshot of the source PDB.

A CDB can be duplicated using Recovery Manager (RMAN) with no configuration required before starting the duplication.

A CDB can be duplicated using the Database Configuration Assistant (DBCA) in silent mode with no configuration required before starting the duplication.

A PDB snapshot can be a full copy of a source PDB.

A snapshot copy PDB can be a full copy of a source PDB.

A snapshot copy PDB does not depend on an existing storage snapshot of the source PDB.

NO.50 Which three are true about performing an Oracle Database install on Linux?

The runfixup.sh script can install missing RPMs.

The Oracle Preinstallation RPM can be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.

It can be done before installing Grid Infrastructure for a Standalone Server.

The Oracle Preinstallation RPM must be used to configure the Oracle database installation owner, the Oracle Inventory group, and an Oracle administrative privileges group.

It can be done after installing Grid Infrastructure for a Standalone Server.

The Oracle database administrator must be granted access to the root operating system account to run root privileged scripts.

It allows you to select the languages supported by the Oracle database server.

NO.51 Choose three. Which three are true about the FLASHBACK DATABASE feature?

FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.

It requires that the target database be in ARCHIVELOG mode.

FLASHBACK LOGS are archived after a log switch.

A database can be flashed back using SQL*PLUS.

It always generates REDO and UNDO.

Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.

NO.52 In a single-instance, multitenant container database (CDB), which three are only ever defined in or part of CDB$ROOT?

redo logs

control files

all data dictionary metadata

user-defined PL/SQL packages

temporary tablespaces

mandatory Oracle-supplied PL/SQL packages

undo tablespaces

NO.53 Examine this configuration:
1.The ORCL database data files are in Automatic Storage Management (Oracle ASM) disk group +DATA.
2.ORCL uses disk group +FRA for the Fast Recovery Area.
3.LISTENER is the listener for ORCL.
4.The database, listener, ASM instance, and ASM disk groups are managed by Oracle Restart.
5.All components are currently shut down.
You execute this command:

What is the outcome?

The ORCL database, the Oracle ASM instances, the +DATA and +FRA disk groups, and the LISTENER are started.

Only the ORCL database instance is started.

Only the ORCL database and the ASM instances are started.

Only the ORCL database instance, the Oracle ASM instance, and the +DATA and +FRA disk groups are started.

Only the ORCL database instance and the +DATA and +FRA disk groups are started.

Oracle 1Z0-083 certification exam is a popular choice for professionals looking to advance their career in database administration. Designed for experienced database administrators, 1Z0-083 exam tests candidates on their ability to manage and maintain an Oracle database environment.

Oracle 1Z0-083 exam measures the candidate’s ability to configure and manage advanced database features such as database security, backup and recovery, performance tuning, and high availability. It also tests the candidate’s knowledge of Oracle Database architecture, SQL tuning, and database tuning.

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