Oracle认证Oracle认证Oracle认证ORACLE选择题

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• 41You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.Which method or feature should you use、

  A.Compare Period ADDM report

  B.AWR Compare Period report

  C.Active Session History (ASH) report

  D.Taking a new snapshot and comparing it with a preserved snapshot

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• 42You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schem

  A.Examine the following steps:1.Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement.2.Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500)procedure.3. Execute the required queries on the CUSTOMERS table.4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement.Identify the correct sequence of steps.A.3, 2, 1, 4

  B.2, 3, 4, 1

  C.4, 1, 3, 2

  D.3, 2, 4, 1

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• 43Which three statements are true about Automatic Workload Repository (AWR)、

  A.All AWR tables belong to the SYSTEM schema.

  B.The AWR data is stored in memory and in the database.

  C.The snapshots collected by AWR are used by the self-tuning components in the database

  D.AWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.

  E.AWR contains system wide tracing and logging information.

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• 44An application accesses a small lookup table frequently. You notice that the required data blocks are getting aged out of the default buffer cache.How would you guarantee that the blocks for the table never age out、

  A.Configure the KEEP buffer pool and alter the table with the corresponding storage clause.

  B.Increase the database buffer cache size.

  C.Configure the RECYCLE buffer pool and alter the table with the corresponding storageclause.

  D.Configure Automata Shared Memory Management.

  E.Configure Automatic Memory Management

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• 45You conned using SQL Plus to the root container of a multitenant container database (CDB) with SYSDBA privilege.The CDB has several pluggable databases (PDBs) open in the read/write mode.There are ongoing transactions in both the CDB and PDBs.What happens alter issuing the SHUTDOWN TRANSACTIONAL statement、

  A.The shutdown proceeds immediately.The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolled hack.

  B.The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.

  C.The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back.

  D.The statement results in an error because there are open PDBs.

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• 46You are planning the creation of a new multitenant container database (CDB) and want to store the ROOT and SEED container data files in separate directories.You plan to create the database using SQL statements.Which three techniques can you use to achieve this、

  A.Use Oracle Managed Files (OMF).

  B.Specify the SEED FILE_NAME_CONVERT clause.

  C.Specify the PDB_FILE_NAME_CONVERT initialization parameter.

  D.Specify the DB_FILE_NAMECONVERT initialization parameter.

  E.Specify all files in the CREATE DATABASE statement without using Oracle managed Files (OMF).

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• 47You are about to plug a multi-terabyte non-CDB into an existing multitenant container database (CDB).The characteristics of the non-CDB are as follows:、 Version: Oracle Database 11g Release 2 (11.2.0.2.0) 64-bit、 Character set: AL32UTF8、 National character set: AL16UTF16、 O/S: Oracle Linux 6 64-bitThe characteristics of the CDB are as follows:、 Version: Oracle Database 12c Release 1 64-bit、 Character Set: AL32UTF8、 National character set: AL16UTF16、 O/S: Oracle Linux 6 64-bitWhich technique should you use to minimize down time while plugging this non-CDB into the CDB、

  A.Transportable database

  B.Transportable tablespace

  C.Data Pump full export/import

  D.The DBMS_PDB package

  E.RMAN

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• 48Your database supports an online transaction processing (OLTP) application. Theapplication is undergoing some major schema changes, such as addition of new indexes and materialized views. You want to check the impact of these changes on workloadperformance.What should you use to achieve this、

  A.Database replay

  B.SQL Tuning Advisor

  C.SQL Access Advisor

  D.SQL Performance Analyzer

  E.Automatic Workload Repository compare reports

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• 49An administrator account is granted the CREATE SESSION and SET CONTAINER systemprivileges.A multitenant container database (CDB) instant has the following parameter set:THREADED_EXECUTION = FALSEWhich four statements are true about this administrator establishing connections to root in a CDB that has been opened in read only mode、

  A.You can conned as a common user by using the connect statement.

  B.You can connect as a local user by using the connect statement.

  C.You can connect by using easy connect.

  D.You can connect by using OS authentication.

  E.You can connect by using a Net Service name.

  F.You can connect as a local user by using the SET CONTAINER statement

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• 50You notice a performance change in your production Oracle database and you want to know which change has made this performance difference.You generate the Compare Period Automatic Database Diagnostic Monitor (ADDM) reportto further investigation.Which three findings would you get from the report、

  A.It detects any configuration change that caused a performance difference in both time periods.

  B.It identifies any workload change that caused a performance difference in both time periods.

  C.It detects the top wait events causing performance degradation.

  D.It shows the resource usage for CPU, memory, and I/O in both time periods.

  E.It shows the difference in the size of memory pools in both time periods.

  F.It gives information about statistics collection in both time periods.

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