Get Ready to Pass the 1Z0-083 exam with Oracle Latest Practice Exam [Q144-Q163]

October 4, 2026 1Z0-083, Oracle 0 Comments

Get Ready to Pass the 1Z0-083 exam with Oracle Latest Practice Exam [Q144-Q163]

Rate this post

Get Ready to Pass the 1Z0-083 exam with Oracle Latest Practice Exam

Get Prepared for Your 1Z0-083 Exam With Actual Oracle Study Guide!

Oracle 1Z0-083 exam is a certification test designed to assess the skills and knowledge of database administrators who are tasked with managing and maintaining Oracle databases. Passing 1Z0-083 exam validates that a candidate has the necessary expertise to work with Oracle Database 19c and perform tasks such as database installation, configuration, backup, recovery, and performance tuning.

Q144. Which two statements are true about indexes and their administration in an Oracle database?

An index can be scanned to satisfy a query without the indexed table being accessed.

A non-unique index can be converted to a unique index using a Data Definition Language (DDL) command.

A descending index is a type of bitmapped index.

An invisible index is maintained when a Data Manipulation Language (DML) command is per- formed on its underlying table.

An index is always created by scanning the key columns from the underlying table.

Q145. Examine this output:

Which two are true?

Any PDB not specified in the plan will be unable to execute statements in parallel.

PDB3 is guaranteed to receive at least 20% of the available system resources if there is enough demand.

Any PDB not specified in the plan will be able to use a maximum of 16.5% of the available system resources.

PDB3 can use all available parallel execution processes at times.

PDB1 is always limited to 40% of the available system resources regardless of demand.

PDB2 is guaranteed at least 25% of the available parallel execution processes if there is enough demand.

Q146. Oracle Data Redaction is active on the SCOTT.EMPtable.
You queried the table twice.
SQL> SELECT ENAME, SAL, COMM, MGR, HIREDATE FROM EMP WHERE DEPTNO=30;

SQL> SELECT ENAME, SAL, COMM, MGR, HIREDATE FROM EMP WHERE DEPTNO=30;

Which is guaranteed to be true concerning the redaction policy?

FULL redaction is active on the SAL column

RANDOM redaction is active on the MGR column

RANDOM redaction is active on the HIREDATE column

PARTIAL redaction is active on the MGR column.

PARTIAL redaction is active of the HIREDATE column.

Q147. 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.)

to switch an existing Oracle Database home to a newer release of Oracle software on the same server

to switch to a read-only Oracle home

to switch back to the previous Oracle home as part of a rollback operation

to switch the Oracle Database home when using a centralized Rapid Home Provisioning server

to switch to a patched Oracle Database home

Q148. Which operating system group is NOT needed to perform an Oracle Database installation?

OSASM

OSKMDBA

OSDBA

OSOPER

OSRACDBA

Q149. After implementing full Oracle Data Redaction, you change the default value for the NUMBER data type as follows: SQL> select number_value from REDACTION_VALUES_FOR_TYPE_FULL; NUMBER_VALUE ————0 SQL> exec DBMS_REDACT.UPDATE_FULL_REDACTION_VALUES(-1); SQL> select number_value from REDACTION_VALUES_FOR_TYPE_FULL; NUMBER_VALUE ————-1 After changing the value, you notice that FULL redaction continues to redact numeric data with zero.What must you do to activate the new default value for numeric full redaction?

Re-enableredactionpoliciesthatuseFULLdataredaction.

Re-createredactionpoliciesthatuseFULLdataredaction.

Re-connect the sessions that access objects with redaction policies defined on them.

Flushthesharedpool.

Restart the database instance. Correct

Q150. 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:
$ srvctl start database -d ORCL
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 instance and the +data and +fra disk groups are started.

Only the orcl database instance, the Oracle ASM instance, and the +data and +fra disk groups are started.

Only the orcl database and the ASM instances are started.

Q151. 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.

Q152. For which two tasks can you use the DBMS_PDB.DESCRIBE procedure?

to generate an XML metadata file that describes a non-CDB Oracle 12c database so that it can be plugged in as a PDB

to generate an XML metadata file from any unplugged PDB

to determine whether an XML file describes a PDB that can be plugged into the CDB in which you run the procedure

to generate a . pdb archive file for any PDB in the current CDB

to generate an XML metadata file that describes the current plugged-in PDB

Q153. You issued this command:
RMAN> BACKUP RECOVERY FILES;
Which two are true? (Choose two.)

All Oracle recovery files not in the current FRA that have not been backed up already, are backed up.

All non-Oracle files in the current FRA that have not been backed up already, are backed up.

All Oracle recovery files in the current FRA that have not been backed up already, are backed up.

All Oracle recovery files in the current fast recovery area (FRA) are backed up.

These backups can be written to disk or SBT.

Q154. Which three are true about block media recovery? (Choose three.)

The data file containing the block being recovered remains online.

To use it, Flashback Database must be enabled.

A block being recovered is not accessible.

It can be performed on noncorrupt blocks.

The target database for which one or more blocks are to be recovered must be in the OPEN state.

It cannot repair logical corruption.

Q155. 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.

Q156. You are administering a multitenant container database (COB) that contains two pluggable databases (PDBs), pdb1 and pdb2. You are connected to pdb2 as a common user with DBA privileges. The statistics_level parameter is PDB modifiable. As the user sys, execute the following command on pdb2:
SQL> ALTER SYSTEM SET STATISTICS_LEVEL=ALL SID=’*’ SCOPE=SPFILE;
Which statement is true about the result of this command?

The statistics_level parameter is set to all when any of the PDBs is reopened.

The statistics_level parameter is set to all only for PDB2 when it is reopened.

The statistics_level parameter is set to all when the root database is restarted.

The statement is ignored because there is no SPFILE for a PDB.

Q157. Which three are true about Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the Manageability Monitor (MMON) background process? (Choose three.)

ADDM can recommend shrinking the buffer cache.

ADDM can recommend extending the buffer cache.

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

ADDM performs its analysis only when a DBA requests it.

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

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

Q158. choose three Which three RMAN persistent settings can be set explicitly?

SPFILE backup duplexing

control file auto backup formats

archive log deletion policy

image copy duplexing

redo log backup duplexing

archive log backup duplexing

Q159. Which two are true about RMAN image copies?

They can only be written to disk.

They can be encrypted using Transparent Data Encryption (TDE).

They can be used as a level 0 incremental backup.

They can be used as a level 1 incremental backup.

They are the only backup option available for databases in NOARCHIVELOG mode.

Q160. Which two are prerequisites for using FLASHBACK TABLE? (Choose two.)

A table’s constraints must be disabled before issuing the flashback.

The FLASHBACK ANY TABLE system privilege or the FLASHBACK object privilege must be granted to the user performing the flashback.

A table’s indexes must be set to unusable before issuing the flashback.

Row Movement must be enabled on the table being flashed back.

The FLASHBACK ANY TABLE system privilege or the FLASHBACK object privilege must be granted to the table owner.

Q161. Choose three. Which three are true about corrupted data blocks and their recovery in an Oracle Database?

If a row lock is held by a nonexistent transaction, the block containing the row is media corrupt.

DB_BLOCK_CHECKING=TRUE causes a check sum to be added to each data block to help detect physical or media corruption.

A media corrupt block is one where the block is not formatted correctly.

The ANALYZE TABLE VALIDATE STRUCTURE CASCADE command verifies that each table row has an index entry pointing to it.

If a row lock is held by a nonexistent transaction, the block containing the row is logically corrupt.

DB_LOST_WRITE_PROTECT=TYPICAL causes extra logging overhead on the standby database.

Q162. Which two are true about Oracle Flashback features? (Choose two.)

FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.

FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.

FLASHBACK TABLE can undrop a column.

FLASHBACK DROP can undrop an index when undropping a table.

After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.

Q163. 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.

Preparing for the Oracle 1Z0-083 exam requires dedication, hard work, and a strong understanding of Oracle database administration concepts. Candidates can take advantage of various resources, including Oracle’s official study materials, practice exams, and training courses. Passing the Oracle 1Z0-083 exam can open up new career opportunities and help professionals demonstrate their expertise in managing and maintaining Oracle databases.

Pass Your Next 1Z0-083 Certification Exam Easily & Hassle Free: https://www.examslabs.com/Oracle/Oracle-Database-19c/best-1Z0-083-exam-dumps.html