You want to move all the objects of the APPS user in the test database to the DB_USER schema of the production database. Which option of IMPDP would you use to accomplish this task？（）

多项选择题When you try to start the Database Control by using the emctl start dbconsole command the following error is displayed：  TZ set to America New_york  OC4J Configuration issue.  u01 app oracle product 10.1.0 db_1 oc4j j2ee OC4J_DBConsole_orcl.us.oracle.com not found.  Which two environment variables do you need to set appropriately to avoid such errors and start the Database Control successfully？（）

A.NLS_LANG
B.ORACLE_SID
C.ORACLE_HOME
D.ORACLE_BASE
E.LD_LIBRARY_PATH

单项选择题TheSCOTTuserhasanindexontheITEM_DESCcolumnoftheITEMtable.Aspartoftheyear-endingtask，SCOTTupdatestheITEM_DESCcolumnformostoftherowsintheITEMtable.Howdoesthischangetothetableaffecttheindex？（）

A.An update in a leaf row takes place.
B.The index becomes invalid after the update.
C.The leaf block containing the row to be updated is marked as invalid.
D.A row in the leaf block of the index for the key value is deleted and inserted.

单项选择题Your tnsnames.ora file has the following entry for the service alias ORCL：  ORCL =  （DESCRIPTION =  （ADDRESS = （PROTOCOL = TCP） （HOST = 10.156.24.216） （PORT = 1521））   （CONNECT_DATA =  （SERVER = DEDICATED） （SERVICE_NAME = orcl.oracle.com）   ）   ）   The TNSPING command executes successfully when tested with ORCL but you are not able to connect to the database instance with the following command：  SQL> CONNECT scott tiger@orcl  What could be the reason for this？（）

A.The listener is not running at the server.
B.The TNS_ADMIN environmental variable is set to a wrong value.
C.The orcl.oracle.com database service is not registered with the listener.
D.The DEFAULT_DOMAIN parameter is set to a wrong value in the SQLNET.ORA file.

单项选择题Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered  SQL > CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees；  Table created.  Further， you executed the following command to drop the table：  SQL> DROP TABLE emp；Table dropped.  What happens in this scenario？（）

A.The table is moved to the SYSAUX tablespace.
B.The table is moved to the SYSTEM tablespace.
C.The table is removed from the database permanently.
D.The table is renamed and remains in the TBSFD tablespace.

多项选择题WhichtwostatementsaboutRecoveryManager（RMAN）backupsaretrue？（）

A.Online redo log files can be backed up.
B.Archived redo log files are backed up.
C.Only used data blocks can be backed up as backup sets.
D.Only consistent database backups can be performed.
E.RMAN backup can be taken only if the database is configured in ARCHIVELOG mode.