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

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• 1On 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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• 2Which 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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• 3You 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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• 4Oracle 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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• 5Which 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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• 6A 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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• 7You use the segment advisor to help determine objects for which space may be reclaimed.Which three statements are true about the advisor given by the segment advisor、

  A.It may advise the use of online table redefinition for tables in dictionary managed tablespace.

  B.It may advise the use of segment shrink for tables in dictionary managed tablespaces it the no chained rows.

  C.It may advise the use of online table redefinition for tables in locally managed tablespaces

  D.It will detect and advise about chained rows.

  E.It may advise the use of segment shrink for free list managed tables.

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• 8You have altered a non-unique index to be invisible to determine if queries execute within an acceptable response time without using this index.Which two are possible if table updates are performed which affect the invisible index columns、

  A.The index remains invisible.

  B.The index is not updated by the DML statements on the indexed table.

  C.The index automatically becomes visible in order to have it updated by DML on the table.

  D.The index becomes unusable but the table is updated by the DML.

  E.The index is updated by the DML on the table.

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• 9The persistent configuration settings for RMAN have default for all parameters.Identify four RMAN commands that produce a multi-section backup.

  A.BACKUP TABLESPACE SYSTEM SECTION SIZE 100M;

  B.BACKUP AS COPY TABLESPACE SYSTEM SECTION SIZE 100M;

  C.BACKUP ARCHIVELOG ALL SECTION SIZE 25M;

  D.BACKUP TABLESPACE "TEMP" SECTION SIZE 10M;

  E.BACKUP TABLESPACE "UNDO" INCLUDE CURRENT CONTROLFILE SECTION SIZE 100M;

  G.BACKUP SPFILE SECTION SIZE 1M;

  H.A.BACKUP TABLESPACE SYSTEM SECTION SIZE 100M;B.BACKUP AS COPY TABLESPACE SYSTEM SECTION SIZE 100M;C.BACKUP ARCHIVELOG ALL SECTION SIZE 25M;D.BACKUP TABLESPACE "TEMP" SECTION SIZE 10M;E.BACKUP TABLESPACE "UNDO" INCLUDE CURRENT CONTROLFILE SECTION SIZE 100M;F.BACKUP SPFILE SECTION SIZE 1M;G.BACKUP INCREMENTAL LEVEL 0 TABLESPACE SYSAUX SECTION SIZE 100M;

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• 10Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs.You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands:SQL > SHUTDOWN IMMEDIATESQL > STARTUP MOUNTSQL > FLASHBACK DATABASE to TIME “TO_DATE (‘08/20/12’ , ‘MM/DD/YY’)”;Examine following commands:1. ALTER PLUGGABLE DATABASE ALL OPEN;2. ALTER DATABASE OPEN;3. ALTER DATABASE OPEN RESETLOGS;Which command or commands should you execute next to allow updates to the flashback back schema、

  A.Only 1

  B.Only 2

  C.Only 3

  D.3 and 1

  E.1 and 2

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