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Oracle Database Administration II Sample Questions (Q276-Q281):

NEW QUESTION # 276
Which two are true about poorly performing SQL statements and their tuning in Oracle database instances? (Choose two.)

A. SQL statements performing many physical I/Os can always have their performance improved by creating indexes.
B. Poorly performing SQL statements can be tuned automatically by the Oracle server.
C. SQL statements doing joins always do more physical I/O than single table queries.
D. The solution that best optimizes one SQL statement can degrade the performance of others.
E. SQL statements doing only logical reads never require tuning because they do no physical I/O.

Answer: B,D

Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28274/sql_tune.htm#PFGRF028

NEW QUESTION # 277
PDB1and PBD2are pluggable databases in CDB1.
Examine these commands:

CDB1is then restarted.
Which three are true? (Choose three.)

A. PDB$SEED will be MOUNTED.
B. PDB1 will be MOUNTED.
C. PDB2 will be MOUNTED.
D. PDB1 will be opened READ WRITE.
E. PDB2 will be opened READ WRITE.
F. PDB$SEED will be opened READ ONLY.

Answer: C,D,F

Explanation:
https://oracledbwr.com/oracle-pluggable-database-automatic-startup/

NEW QUESTION # 278
Which three are true about Data Pump in an Oracle multitenant environment?

A. It can be used to transport data between PDBs.
B. It can be used to transport data from a PDB to a non-CDB.
C. It can be used to clone a CDB.
D. It can be used to create a new PDB.
E. It can be used to transport data from a non-CDB to a PDB.

Answer: A,B,E

NEW QUESTION # 279
Which three are true about requirements for various FLASHBACK operations? (Choose three.)

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

Answer: A,B,E

NEW QUESTION # 280
Which two are true about backup encryption?

A. The BACKUP BACKUPSET command can encrypt and decrypt backup sets.
B. Vendor-specific media management software can be used for making encrypted RMAN backups to media.
C. Image copies can be encrypted.
D. Backup encryption can be enabled selectively for specific tablespaces.
E. Keystore-based encryption is the default mode for RMAN backup encryption.
F. The Transparent Data Encryption (TDE) keystore is backed up using RMAN.

Answer: A,E

NEW QUESTION # 281
......

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100% Pass Quiz 2026 Oracle 1Z0-083: Oracle Database Administration II High Hit-Rate Question Explanations

1Z0-083 Valid Exam Registration - 1Z0-083 Top Dumps

Oracle Database Administration II Sample Questions (Q276-Q281):

ফ্রি PDF Oracle - 1Z0-083 –The Best Question Explanations

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