People are good at processing and understanding "probabilistic" data about health.A．YB．NC．

A. All the related indexes and views are automatically dropped

B. The flashback drop feature can recover only the table structure

C. Only the related indexes are dropped whereas views are invalidated

D. The flashback drop feature can recover both the table structure and its data

A. All the related indexes and views are automatically dropped

B. The flashback drop feature can recover only the table structure

C. Only the related indexes are dropped whereas views are invalidated

D. The flashback drop feature can recover both the table structure and its data

A. Flashback logs are written sequentially, and are archived.

B. Flashback Database uses a restored control file to recover a database.

C. The Oracle database automatically creates, deletes, and resides flashback logs in the Fast RecoveryArea.

D. Flashback Database can recover a database to the state that it was in before a reset logs operation.

E. Flashback Database can recover a data file that was dropped during the span of time of the flashback.

F. Flashback logs are used to restore to the blocks‘ before images, and then the redo data may be used to roll forward to the desired flashback time.

t; TO SCN <scn>;2. SELECT * FROM <table> AS OF SCN 123456;3. FLASHBACK TABLE <table> TO BEFORE DROP;4. FLASHBACK DATABASE TO TIMESTAMP <timestamp>;5. SELECT * FROM <table> VERSIONS AS OF SCN 123456 AND 123999;Which of these statements will be dependent on the availability of relevant undo data in the undo segment？（）

A. 1, 2, and 5

B. 1, 3, and 4

C. 2, 3, 4, and 5

D. 1, 2, 3, 4, and 5

You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table.Before executing the FLASHBACK TABLE command, thesystem change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that thetable is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command.Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command？（）

A. Restore the backup control file and open the database with RESETLOGS option.

B. Perform point-in-time recovery because flashback cannot be performed again on this table

C. Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571

D. Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

You are working in an online transaction processing (OLTP) environment. You use the FLASHBACKTABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command, the system change number (SCN) was 663571. After flashing back the CUSTOMERS table, you realize that the table is not in the correct state. Now, you need to reverse the effects of the FLASHBACK TABLE command.Which is the fastest and the most efficient option to reverse the effects of the FLASHBACK TABLE command？（）

A. Restore the backup control file and open the database with RESETLOGS option.

B. Perform point-in-time recovery because flashback cannot be performed again on this table

C. Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571

D. Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571

A. Drop the table.

B. Partition the table

C. Truncate the table.

D. Add a column to the table.

E. Rename a column in the table.

occurred at 8:30 am. Which option must you use to check whether a flashback operation can recover the database to the specified time？ （）

A. Check the alert log file

B. Query the V$FLASHBACK_DATABASE_LOG view

C. Query the V$RECOVERY_FILE_DEST_SIZE view

D.Query the V$FLASHBACK_DATABASE_STAT view

E. Check the value assigned for the UNDO_RETENTION parameter

Your multitenant container database (CDB) contains three pluggable database (PDBs). You find that the control file is damaged. You plan to use RMAN to recover the control file. There are no startup triggers associated with the PDBs.Which three steps should you perform to recover the control file and make the database fully operational？（）

A. Mount the container database (CDB) and restore the control file from the control file auto backup.

B. Recover and open the CDB in NORMAL mode.

C. Mount the CDB and then recover and open the database, with the RESETLOGS option.

D. Open all the pluggable databases.

E. Recover each pluggable database.

F. Start the database instance in the nomount stage and restore the control file from control file auto backup.