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The Oracle 1Z0-083 exam consists of 85 multiple-choice questions that must be completed within 105 minutes. 1Z0-083 exam fee is $245 USD, and it can be taken in-person at a Pearson VUE testing center or online through the Pearson VUE OnVUE platform. To prepare for the exam, candidates can take Oracle's recommended training courses, use Oracle's study guides, and practice with Oracle's sample questions. Passing the Oracle 1Z0-083 Exam is a valuable achievement for any database administrator, as it demonstrates their advanced skills and knowledge in Oracle Database Administration.

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Oracle 1Z0-083 certification exam is designed to validate your skills and knowledge in Oracle Database Administration II. It is an intermediate-level exam that tests your proficiency in managing and administering Oracle databases. 1Z0-083 exam covers a wide range of topics such as database security, backup and recovery, performance tuning, and database upgrades. Passing 1Z0-083 Exam demonstrates that you have the skills and expertise required to manage complex Oracle databases.

Oracle Database Administration II Sample Questions (Q125-Q130):

NEW QUESTION # 125
Which three are true about requirements for various FLASHBACKoperations? (Choose three.)

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

Answer: C,E,F

Explanation:
Explanation/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=o nepage&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 # 126
Which two are true about changing the LOCAL_UNDO_ENABLED property to false in a CDB? (Choose two.)

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

Answer: B,E

Explanation:
Explanation
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.

NEW QUESTION # 127
Which three are true about the FLASHBACK DATABASE feature? (Choose three.)

A. FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.
B. It requires that the target database be in ARCHIVELOG mode.
C. A database can be flashed back using SQL*PLUS.
D. Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.
E. It always generates REDO and UNDO.
F. FLASHBACK LOGS are archived after a log switch.

Answer: B,C,E

Explanation:
A is wrong - they are never archived.
C is wrong - 19c docs: Queries do not change data and thus do not contribute to logging activity for Flashback Database.
D is wrong - according to documentation and my practice some ARCHIVE LOGs are required too.

NEW QUESTION # 128
Your container database, CDB1, has an application container, HR_ROOT, with an application PDB, HR_PDB1.
You have the required privilege to clone HR_PDB1to container database CDB2, which does not contain HR_ROOT.
Which two are always true? (Choose two.)

A. All transactions in HR_PDB1 of CDB1 must commit before the cloning process starts.
B. CDB1 and CDB2 must be in shared undo mode.
C. The HR_PDB1 clone created in CDB2 will be in mount state when cloning ends.
D. Cloning HR_ROOT automatically clones HR_PDB1.
E. A common user must exist in CDB2 with the CREATE PLUGGABLE DATABASE privilege.

Answer: C,E

Explanation:
After you create the application PDB, it is in mounted mode, and its status is NEW.
https://docs.oracle.com/en/database/oracle/oracle-database/21/multi/creating-application- pdb.html#GUID-88E61123-F651-47D7-9977-B589268EBD29

NEW QUESTION # 129
Which three are true about cloning databases into an existing CDB with RMAN?

A. The target and auxiliary instance passwords must be the same.
B. A user with SYSDBA or SYSBKUP must be logged in with RMAN to the non-CDB being cloned when cloning a non-CDB.
C. A user with SYSDBA or SYSBKUP must be logged in with RMAN to CDB$ROOT when cloning a PDB.
D. Two or more PDBs can be cloned with the same command.
E. Only one PDB can be cloned at a time.
F. A non-CDB can be cloned into a PDB.

Answer: B,C,E

NEW QUESTION # 130
......

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