[UPDATED] Oracle 1Z0-083 Certification Exam Questions [Q70-Q94]

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[UPDATED] Oracle 1Z0-083 Certification Exam Questions

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Oracle 1Z0-083 Exam Syllabus Topics:

Topic	Details
Topic 1	Perform Backup and Recover CDBs and PDBs Create a new PDB from the CDB seed Clone PDBs and Application containers
Topic 2	Restore and Recovering Databases with RMAN Comparing Local Undo Mode and Shared Undo Mode
Topic 3	Understanding and Using The Performance Tuning Methodology Explain the purpose of application root and application seed
Topic 4	Create multi-section backups of very large files Create and administer Application PDBS Detect and repair database and database block corruption

Exam Topic for Oracle Database Administration II Exam Number: 1Z0-083

The following will be discussed in ORACLE 1Z0-083 exam dumps:

Diagnosing Failures
Transporting Data
Backup and Duplicate
Backup Strategies and Terminology
Creating CDBs and Regular PDBs
Install Grid Infrastructure and Oracle Database
Manage Application PDBs
Using Flashback Technologies

NEW QUESTION 70
Which two are true about the Oracle dataabse methodology? (Choose two.)

The Oracle Database time model should be used to find the database and instance areas most in need of tuning.

Tuning activities should stop once the user is satisfied with performance.

Tuning activities should stop once agreed service levels for performance have been met.

The database instance memory should always be tuned before tuning any file systems.

SQL statements should always be tuned before tuning any file systems.

The alert log should be used to find the database and instance areas most in need of tuning.

NEW QUESTION 71
Choose three. Which three are true about backing up the control file?

It cannot be backed up manually as a binary copy.

It gets backed up automatically by RMAN as a trace file containing SQL statements for control file re-creation when a database backup occurs.

It can be backed up manually as a binary copy.

It can get backed up automatically as a binary copy.

It gets backed up automatically by RMAN when the BACKUP SPFILE command is used.

It can be backed up manually as a trace file containing SQL statements for control file recreation.

NEW QUESTION 72
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

Explanation
https://www.oracle.com/a/tech/docs/twp-upgrade-oracle-database-19c.pdf

NEW QUESTION 73
A container database called CDB1 is OMF-enabled.
PDB_FILE_NAME_CONVERT is not configured in CDB1. PDB1 was unplugged from CDB1 earlier in the week. Examine this command, which will be executed in CDB1:
CREATE PLUGGABLE DATABASE pdb1
USING ‘/u01/app/oracle/oradata/pdb1.xml’
SOURCE_FILE_NAME_CONVERT =
(‘/u01/app/oracle/oradata/’, ‘/u02/app/oracle/oradata/’);
Which two are true? (Choose two.)

PDB1 data files already exist in the correct location.

DBMS_PDB.CHECK_PLUG_COMPATIBILITY must be run in CDB1 before executing the command.

PDB_FILE_NAME_CONVERT must be set before executing the command.

/u01/app/oracle/oradata/pdb1.xml does not contain the current locations of data files for PDB1.

PDB1 must be dropped from CDB1.

NEW QUESTION 74
For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (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

NEW QUESTION 75
Which three are located by using environment variables? (Choose three.)

the Optimal Flexible Architecture (OFA) compliant path to store Oracle software and configuration files.

the location of Oracle Net Services configuration files

the list of a disk group names to be mounted by an Oracle Automatic Storage Management (ASM) instance at startup

default directories for temporary files used by temporary tablespaces

the temporary disk space used by Oracle Installer during installation

the maximum number of database files that can be opened by a database instance

NEW QUESTION 76
Which three are true about an application seed pluggable database (PDB)? (Choose three.)

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.

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 cannot be dropped from its application container.

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.

NEW QUESTION 77
Choose two. Which two are true about backup set compression using RMAN default compression?

Compressed backups cannot have a section size defined.

Compressed backups can be written only to media.

Binary compression adds CPU overhead to backup operations.

Unused blocks below the high water mark are backed up.

Compression can be done only for locally managed tablespaces.

NEW QUESTION 78
Choose three. Which three are true about Audit policies in container databases (CDBs)?

All audit records are written to the audit trail in CDB$ROOT .

Application-common unified audit policies defined in an application root must be manually synchronized by each application PDB contained in the application root.

Fine-grained auditing policies defined in an application root must be manually synchronized by each application PDB contained in the application root.

A common unified audit policy can be created at the CDB level.

A common unified audit policy can be created at the application root level.

An application PDB cannot have a local audit policy.

NEW QUESTION 79
Choose three. Which three are true about using an RMAN Recovery Catalog with a pluggable database (PDB) target connection in Oracle Database 19c and later releases?

The base catalog owner must give the Virtual Private Catalog access to metadata for one or more PDBs.

The target PDB must be registered in both the base catalog and the Virtual Private Catalog.

The base catalog must be used by RMAN when performing point-in-time recovery for the PDB registered in the Virtual Private Catalog.

The base catalog must be enabled for Virtual Private Catalog use.

The target PDB must be registered in a Virtual Private Catalog.

The target PDB must be registered in a base catalog.

NEW QUESTION 80
Examine these queries and their output:

An online RMAN backup of the CDB was taken an hour before Restore Point ri was created.
You want to recover PDB1 to Restore Point R1.
How do you achieve this?

Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to CDB$ROOT.

Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to PDB1.

Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using RMAN while connected to CDB$ROOT.

Execute FLASHBACK PLUGGABLE DATABASE PDB1 TO RESTORE POINT R1 by Using SQL while connected to PDB1.

This cannot be done due to the lack of a clean restore point.

NEW QUESTION 81
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.

NEW QUESTION 82
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.

Explanation
https://mikedietrichde.com/2017/08/22/oracle-optimizer-statistics-advisor-in-oracle-database-12-2-0-1/
https://www.oracle.com/technetwork/database/bi-datawarehousing/twp-bp-for-stats-gather-19c-5324205.pdf

NEW QUESTION 83
Which two are true about changing the LOCAL_UNDO_ENABLEDproperty to false in a CDB? (Choose two.)

After the change, only a common user with the required privilege can create an undo tablespace in CDB&ROOT.

Any new PDB and existing PDBs are automatically configured to use the default undo tablespace in CDB$ROOT.

After the change, only one undo tablespace can exist in CDB$ROOT.

After the change, any user with the required privilege can create an undo tablespace in the PDBs.

Undo tablespaces existing in PDBs must be dropped before the change.

After the change, each existing PDB has to be reopened for the new undo mode to take effect.

Explanation/Reference: https://docs.oracle.com/en/database/oracle/oracle-database/18/multi/creating-and-configuring-a- cdb.html#GUID-12ADA04D-F81D-4579-A68C-0958CC7D6C2F

NEW QUESTION 84
Which four are true about duplicating a database using Recovery Manager (RMAN)? (Choose four.)

Duplication can be done by having the auxiliary database instance pull backup sets from the target database instance.

A connection to an auxiliary instance is always required.

A subset of the target database can be duplicated.

A new DBID is always created for the duplicated database.

A connection to the recovery catalog instance is always required.

A backup of the target database is always required.

Duplication can be done by having the target database instance push copies to the auxiliary database instance.

A connection to the target database instance is always required.

NEW QUESTION 85
Choose the best answer. Examine this configuration: 1. CDB1 is a container database. 2.
COMMON_USER_PREFIX is set to an empty string. 3. PDB1 is a pluggable database in CDB1. 4. APP1_ROOT is an application container in CDB1. 5. APP1_PDB1 is an application PDB in APP1_ROOT. You execute these commands: S sqlplus sys/oracle@localhost:1521/cdb1 as sysdba SQL> CREATE ROLE role1 CONTAINER=CURRENT; Which is true?

It will return an error because creation of a local role is not allowed in CDB$ROOT.

ROLE1 will be created only in CDB$ROOT.

It will return an error because common roles must start with C##.

ROLE1 will be created only in CDB$ROOT and APP1_ROOT.

ROLE1 will be created in CDB$ROOT, PDB1, APP1_ROOT, and APP1_PDB1.

NEW QUESTION 86
Which two statements are true about the Database Configuration Assistant (DBCA)?

It can configure Automatic Storage Management (ASM) diskgroups.

It can be used to copy an existing Oracle database to a new host and apply any patches necessary in the new host.

It can be used to add a new tablespace.

It can be used to create a database template from an existing database.

It can generate SQL database creation scripts.

NEW QUESTION 87
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.

Reference:
https://docs.oracle.com/database/121/TGDBA/tune_shared_pool.htm

NEW QUESTION 88
Which two are true about RMAN duplexed backup sets?

A non-duplexed backup set written to disk can be duplexed to tape by backing up the backup set that is already on disk.

A duplexed backup set always uses twice as many SBT channels as a non-duplexed backup set for the same number of files.

A non-duplexed backup set written to disk can be duplexed to disk by backing up the backup set that is already on disk.

A non-duplexed backup set written to SBT can be duplexed to disk by backing up the backup set that is already on tape.

A non-duplexed backup set written to SBT can be duplexed to tape by backing up the backup set that is already on tape.

A duplexed backup set uses the same number of SBT channels as a non-duplexed backup set for the same number of files.

NEW QUESTION 89
Choose two. When backing up to the Oracle Fast Recovery Area (FRA), you determine that the backup takes too long and suspect a performance bottleneck. Which two are true about diagnosing and tuning these problems?

Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a potential performance bottleneck when asynchronous I/O is used.

If an RMAN BACKUP VALIDATE command takesroughly the same time as an actual backup, then read I/O is a likely bottleneck.F

If an RMAN BACKUP VALIDATE command takes noticeably less time than an actual backup, then write I/O is a likely bottleneck.

If an RMAN BACKUP VALIDATE command takesroughly the same time as an actual backup, then both read and write I/O are likely bottlenecks.

Data files with a high value in V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential performance bottleneck when synchronous I/O is used.

NEW QUESTION 90
Which three are true about requirements for various FLASHBACK operations? (Choose three.)

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

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

Reference:
https://books.google.com.pk/books?id=0iwrL9P25Z0C&pg=PA35&lpg=PA35&dq=FLASHBACK+transaction
+query+requires+undo+to+retrieve+all+versions+of+a+row+that+existed+between+two+points+in
+time&source=bl&ots=MJnYl5CZ1u&sig=ACfU3U0dWP-NPd- U8uu3zbaoi3YZzT0FTQ&hl=en&sa=X&ved=2ahUKEwigi5_Jl9joAhXzUBUIHUh4DksQ6AEwAnoECAsQJg#v= onepage&q=FLASHBACK%20transaction%20query%20requires%20undo%20to%20retrieve%20all% 20versions%20of%20a%20row%20that%20existed%20between%20two%20points%20in%20time&f=false
https://docs.oracle.com/cd/E18283_01/server.112/e17120/tables011.htm

NEW QUESTION 91
Choose two. Which two are true about RMAN Multisection backups when a very large data file is divided into four sections?

The four sections must be image copies.

Each of the file sections must be processed serially.

The four sections must be contained in backup sets.

The four sections can be created in parallel.

The four sections can be created serially.

NEW QUESTION 92
Examine this configuration:
1. CDB1 is a container database.
2. PDB1 and PDB2 are pluggable databases in CDB1.
You execute these commands successfully:

Which two are true?

Redo logs are opened.

PDB$SEED is in read only state.

PDB1 and PDB2 are in read only state.

PDB1 and PDB2 are in mount state.

CDB$ROOT is in mount state.

NEW QUESTION 93
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.)

Data file 24 can be recovered only while connected to PDB2.

Data file 24 can be restored and recovered while connected to CDB$ROOT.

Data file 24 can be restored only while connected to CDB$ROOT.

Data file 24 can be restored only while connected to PDB2.

Data file 24 can be recovered while connected to PDB2.

Data file 24 can be recovered while connected to CDB$ROOT.

NEW QUESTION 94
A container database called CDB1 is OMF-enabled. PDB_FILE_NAME_CONVERT is not configured in CDB1. PDB1 was unplugged from CDB1 earlier in the week. Examine this command, which will be executed in CDB1: CREATE PLUGGABLE DATABASE pdb1 USING ‘/u01/app/oracle/oradata/pdb1.xml’ SOURCE_FILE_NAME_CONVERT = (‘/u01/app/oracle/oradata/’, ‘/u02/app/oracle/oradata/’); Which two are true? (Choose two.)

PDB1 data files already exist in the correct location.

DBMS_PDB.CHECK_PLUG_COMPATIBILITY must be run in CDB1 before executing the command.

PDB_FILE_NAME_CONVERT must be set before executing the command.

/u01/app/oracle/oradata/pdb1.xml does not contain the current locations of data files for PDB1.

PDB1 must be dropped from CDB1.

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[UPDATED] Oracle 1Z0-083 Certification Exam Questions [Q70-Q94]

Oracle 1Z0-083 Exam Syllabus Topics:

Exam Topic for Oracle Database Administration II Exam Number: 1Z0-083

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Oracle 1Z0-083 Exam Syllabus Topics:

Exam Topic for Oracle Database Administration II Exam Number: 1Z0-083

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