Free Access Oracle.1Z0-083.v2024-11-13.q152 Practice Test (Page 25)

Question 116

Examine this configuration:
CDB1 is an Oracle Database 12c Release 2 database containing pluggable databases PDB$SEED, PDB1, and PDB2.
PDB$SEED is open READ ONLY
PDB1 is open READ WRITE
PDB2 is MOUNTED.
ORACLE_HOME is /u01/app/oracle/product/18.1.0/dbhome_1.
You execute these commands before upgrading the database to the current release:

For which databases will fixup scripts be created?

A.CDB1, PDB1, and PDB2 only

B.CDB1, PDB$SEED, PDB1, and PDB2

C.CDB1 and PDB$SEED only

D.PDB$SEED, PDB1, and PDB2 only

E.CDB1, PDB$SEED, and PDB1 only

Question 117

Choose three. Which three are true about the FLASHBACK DATABASE feature?

A.FLASHBACK LOGS are archived after a log switch.

B.FLASHBACK DATABASE only uses FLASHBACK LOGS to get the database to the desired flashback time.

C.It always generates REDO and UNDO.

D.A database can be flashed back using SQL*PLUS.

E.Queries and DML have the same FLASHBACK LOG overhead when flashback is enabled for a database.

F.It requires that the target database be in ARCHIVELOG mode.

Question 118

Which two are true about Oracle Flashback features? (Choose two.)

A.After a database is restored from flashback logs using the FLASHBACK DATABASE command, it is sometimes rolled forward using redo logs.

B.FLASHBACK TABLE can undrop a column.

C.FLASHBACK QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.

D.FLASHBACK DROP can undrop an index when undropping a table.

E.FLASHBACK VERSION QUERY can retrieve REDO records from ONLINE and ARCHIVED REDO LOG files.

Question 119

Oracle Managed Files (OMF) is enabled in a CDB and this command is successfully executed:

Which three are true?

A.APP1 can never be unplugged.

B.A default service Is created for the application root APP1.

C.An application seed PDB Is created for APP1.

D.An application root PDB is created for APP1.

E.Application PDBs that are subsequently created in the APP1 application container will be cloned from PDB$SEED.

F.Application PDBs that are subsequently created in the APP1 application container will be cloned from APP1$SEED.

Question 120

While backing up to the Oracle Fast Recovery Area (FRA), you determined the backup istaking too long and suspect a performance bottleneck. Which three are true about diagnosing and tuning these problems? (Choose three.)

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

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

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

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

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

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

G.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.

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