Oracle认证Oracle认证Oracle认证ORACLE选择题

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• 91You enabled an audit policy by issuing the following statements:SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SCOTT;SQL> AUDIT POLICY ORA_DATABASE_PARAMETER BY SYS, SYSTEM;For which database users and for which executions is the audit policy now active、 Select two.

  A.SYS, SYSTEM

  B.SCOTT

  C.Only for successful executions

  D.Only for failed executions

  E.Both successful and failed executions

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• 92What is the result of executing a TRUNCATE TABLE command on a table that has Flashback Archiving enabled、

  A.It fails with the ORA-665610 Invalid DDL statement on history-tracked message

  B.The rows in the table are truncated without being archived.

  C.The rows in the table are archived, and then truncate

  D.D.The rows in both the table and the archive are truncated.

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• 93Which three activities are supported by the Data Recovery Advisor、

  A.Advising on block checksum failures

  B.Advising on inaccessible control files

  C.Advising on inaccessible block change tracking files

  D.Advising on empty password files

  E.Advising on invalid block header field values

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• 94Which three statements are true regarding the use of the Database Migration Assistant for Unicode (DMU)、

  A.A DBA can check specific tables with the DMU

  B.The database to be migrated must be opened read-only.

  C.The release of the database to be converted can be any release since 9.2.0.8.

  D.The DMU can report columns that are too long in the converted characterset.

  E.The DMU can report columns that are not represented in the converted characterset.

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• 95Oracle Grid Infrastructure for a stand-alone server is installed on your production hostbefore installing the Oracle Database server. The database and listener are configured by using Oracle Restart.Examine the following command and its output:$ crsctl config hasCRS-4622: Oracle High Availability Services auto start is enabled.What does this imply、

  A.When you start an instance on a high with SQL *Plus dependent listeners and ASM disk groups are automatically started.

  B.When a database instance is started by using the SRVCTL utility and listener startup fails, the instance is still started.

  C.When a database is created by using SQL* Plus, it is automatically added to the Oracle Restart configuration.

  D.When you create a database service by modifying the SERVICE_NAMES initialization parameter, it is automatically added to the Oracle Restart configuration.

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• 96You performed an incremental level 0 backup of a database:RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE;To enable block change tracking after the incremental level 0 backup, you issued this command:SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE‘ /mydir/rman_change_track.f’;To perform an incremental level 1 cumulative backup, you issued this command:RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which three statements are true、

  A.Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.

  B.The change tracking file must always be backed up when you perform a full database backup.

  C.Block change tracking will always reduce I/O performed during cumulative incremental backups.

  D.More than one database block may be read by an incremental backup for a change made to a single block.

  E.The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.

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• 97Which three resources might be prioritized between competing pluggable databases whencreating a multitenant container database plan (CDB plan) using Oracle Database Resource Manager、

  A.Maximum Undo per consumer group

  B.Maximum Idle time

  C.Parallel server limit

  D.CPU

  E.Exadata I/O

  F.Local filesystem I/O

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• 98On your Oracle Database, you issue the following commands to create indexes:SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE;SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customer_id, sales_rep_id);Which two statements are true、

  A.Only the ORD_CUSTOMER_IX1 index created.

  B.Both the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table.

  C.Both the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table.

  D.B.Both the indexes are updated when a row is inserted, updated, or deleted in the ORDERS tabl

  E.C.Both the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table.D.The ORD_CUSTOMER_IX1 index is not used by the optimizer even when theOPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true.E.Both the indexes are created and used by the optimizer for queries on the ORDERS table.

  F.Both the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.

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• 99Which two statements are true when row archival management is enabled、

  A.The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.

  B.The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.

  C.The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.

  D.The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.

  E.The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Serverbased on activity tracking columns, to Indicate that a row is no longer considered active.

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• 100A warehouse fact table in your Oracle 12c Database is range-partitioned by month andaccessed frequently with queries that span multiple partitionsThe table has a local prefixed, range partitioned index.Some of these queries access very few rows in some partitions and all the rows in other partitions, but these queries still perform a full scan for all accessed partitions.This commonly occurs when the range of dates begins at the end of a month or ends close to the start of a month.You want an execution plan to be generated that uses indexed access when only a few rows are accessed from a segment, while still allowing full scans for segments where many rows are returned.Which three methods could transparently help to achieve this result、

  A.Using a partial local Index on the warehouse fact table month column with indexing disabled to the table partitions that return most of their rows to the queries.

  B.Using a partial local Index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.

  C.Using a partitioned view that does a UNION ALL query on the partitions of the warehouse fact table, which retains the existing local partitioned column.

  D.Converting the partitioned table to a partitioned view that does a UNION ALL query onthe monthly tables, which retains the existing local partitioned column.

  E.Using a partial global index on the warehouse fact table month column with indexing disabling for the table partitions that return most of their rows to the queries.

  F.Using a partial global index on the warehouse fact table month column with indexing disabled for the table partitions that return a few rows to the queries.

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