Most Recent Oracle 1Z0-083 Exam Questions & Answers

Prepare for the Oracle Database Administration II exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.

QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-083 exam and achieve success.

The questions for 1Z0-083 were last updated on Jan 21, 2025.

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Question No. 1

Which two are true about creating pluggable databases (PDBs) using snapshots in Oracle 19c and later releases? (Choose two.)

AA PDB snapshot is always a full copy of the source PDB.

BA PDB snapshot is always a sparse copy of the source PDB.

CA snapshot copy PDB depends on a storage snapshot which can only be stored on specific file systems.

DA PDB snapshot depends on a storage snapshot which can be stored on any file system.

EA PDB snapshot depends on a storage snapshot which can only be stored on specific file systems.

FA snapshot copy PDB depends on a storage snapshot which can be stored on any file system.

GA snapshot copy PDB can be created from a stand-alone clone PDB.

Show Answer

Correct Answer: C, G

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Question No. 2

While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup is taking too long and suspect a performance bottleneck.

Which three are true about diagnosing and tuning these problems? (Choose three.)

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

BSetting DBWR_IO_SLAVES to a non zero value can improve backup performance when using synchronous I/O.

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

DIf an RMAN BACKUP VALIDATE command takes roughly the same time as an actual backup, then read I/O is a likely bottleneck.

EData 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.

FSetting DBWR_IO_SLAVES to a non zero value can improve backup performance when using asynchronous I/O/

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

Show Answer

Correct Answer: B, C, E

Question No. 3

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

AA target database's persistent RMAN configuration settings are always stored in the target's control file

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

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

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

EA target database's persistent RMAN configuration settings are always synchronized automatically with the RMAN catalog.

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

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

Show Answer

Correct Answer: A, C, F

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Question No. 4

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

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

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

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

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

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

FAfter the change, each existing PDB has to be reopened for the new undo mode to take effect.
You can set a CDB in local UNDO mode either at CDB creation or by altering the CDB property. When the database property LOCAL_UNDO_ENABLE is FALSE, which is the default, there is only one UNDO tablespace that is created in the CDB root, and that is shared by all containers. When LOCAL_UNDO_ENABLE is TRUE, every container in the CDB uses local undo and each PDB must have its own local UNDO tablespace. To maintain ease of management and provisioning, UNDO tablespace creation happens automatically and does not require any action from the user. When a PDB is opened and an UNDO tablespace is not available, its automatically created.

Show Answer

Correct Answer: B, C

Question No. 5

The HR_ROOT application container must support the execution of a query on a table shared by application

local PDBs PDB1 and PDB2, and remote PDB PDB3.

Which three are true? (Choose three.)

AA proxy PDB must exist in the application root in the remote CDB.

BA database link must exist in the local CDB root referring to the remote CDB.

CPDB3's application root replica must exist in the local CDB.

DA database link must exist in the remote CDB referring to the local CDB.

EThe HR_ROOT replica must exist in the remote CDB.

FA proxy PDB must exist in the application root in the local CDB.

Show Answer

Correct Answer: D, E, F

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