On your Oracle 12c database, you Issue the following commands to create indexesSQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE;SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id);Which two statement are correct、

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• 1Which two are prerequisites for performing a flashback transaction、

  A.Flashback Database must be enabled.

  B.Undo retention guarantee for the database must be configured.

  C.EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.

  D.B.Undo retention guarantee for the database must be configured.C.EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.D.Supplemental logging must be enabled.

  E.Recycle bin must be enabled for the database.

  F.Block change tracking must be enabled tor the database.

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• 2You are connected to a pluggable database (PDB) as a common user with DBA privileges.The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following:SQL > ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE;Which is true about the result of this command、

  A.The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.

  B.The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.

  C.The STATISTICS_LEVEL parameter is set to all whenever the multitenant containerdatabase (CDB) is restarte

  D.D.Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.

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• 3In which two scenarios do you use SQL* Loader to load data、

  A.Transform the data while it is being loaded into the database.

  B.Use transparent parallel processing without having to split the external data first.

  C.Load data into multiple tables during the same load statement.

  D.Generate unique sequential key values in specified columns.

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• 4Examine the following command;ALTER SYSTEM SET enable_ddl_logging = TRUE;Which statement is true、

  A.Only the data definition language (DDL) commands that resulted in errors are logged in the alert log file.

  B.All DDL commands are logged in the alert log file.

  C.All DDL commands are logged in a different log file that contains DDL statements and their execution dates.

  D.Only DDL commands that resulted in the creation of new segments are logged.

  E.All DDL commands are logged in XML format in the alert directory under the Automatic Diagnostic Repository (ADR) home.

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• 5Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c、

  A.By default, EM express is available for a database after database creation.

  B.You can use EM express to manage multiple databases running on the same server.

  C.You can perform basic administrative tasks for pluggable databases by using the EM express interface.

  D.You cannot start up or shut down a database Instance by using EM express.

  E.You can create and configure pluggable databases by using EM express.

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• 6Your multitenant container database has three pluggable databases (PDBs): PDB1, PDB2, and PDB3.Which two RMAN commands may be; used to back up only the PDB1 pluggable database、

  A.BACKUP PLUGGABLE DATABASE PDB1 while connected to the root container

  B.BACKUP PLUGGABLE DATABASE PDB1 while connected to the PDB1 container

  C.BACKUP DATABASE while connected to the PDB1 container

  D.BACKUP DATABASE while connected to the boot container

  E.BACKUP PLUGGABLE database PDB1 while connected to PDB2

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• 7Identify three benefits of Unified Auditing.

  A.Decreased use of storage to store audit trail rows in the database.

  B.It improves overall auditing performance.

  C.It guarantees zero-loss auditing.

  D.The audit trail cannot be easily modified because it is read-only.

  E.It automatically audits Recovery Manager (RMAN) events.

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• 8You upgraded from a previous Oracle database version to Oracle Database version toOracle Database 12c. Your database supports a mixed workload. During the day, lots of insert, update, and delete operations are performed. At night, Extract, Transform, Load(ETL) and batch reporting jobs are run. The ETL jobs perform certain database operations using two or more concurrent sessions.After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause of performance degradation, you want to collect basic statistics such as the level of parallelism, total database time, and the number of I/O requests for the ETL jobs.How do you accomplish this、

  A.Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.

  B.Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.

  C.Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.

  D.Enable real-time database operation monitoring using theDBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use theDBMS_SQL_MONITOR.REPORT_SQL_MONITOR function to view the required information.

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