Oracle认证Oracle认证Oracle认证ORACLE选择题

试卷预览

• 121You 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.

  开始考试练习点击查看答案
• 122Which 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.

  开始考试练习点击查看答案
• 123On 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、

  A.Both the indexes are created; however, only the ORD_COSTOMER index is visible.

  B.The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan.

  C.Only the ORD_CUSTOMER_IX1 index is create

  D.D.Only the ORD_CUSTOMER_IX2 index is created.

  E.Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table.

  开始考试练习点击查看答案
• 124Your 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

  开始考试练习点击查看答案
• 125Identify 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.

  开始考试练习点击查看答案
• 126You 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.

  开始考试练习点击查看答案