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

试卷相关题目

• 1You 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

  开始考试点击查看答案
• 2You 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

  开始考试点击查看答案
• 3Which three features work together, to allow a SQL statement to have different cursors for the same statement based on different selectivity ranges、

  A.Bind Variable Peeking

  B.SQL Plan Baselines

  C.Adaptive Cursor Sharing

  D.Bind variable used in a SQL statement

  E.Literals in a SQL statement

  开始考试点击查看答案
• 4You notice a high number of waits for the db file scattered read and db file sequential read events in the recent Automatic Database Diagnostic Monitor (ADDM) report. After further   investigation, you find that queries are performing too many full table scans and indexes    are not being used even though the filter columns are indexed.Identify three possible reasons for this.

  A.Missing or stale histogram statistics

  B.Undersized shared pool

  C.High clustering factor for the indexes

  D.High value for the DB_FILE_MULTIBLOCK_READ_COUNT parameter

  E.Oversized buffer cache

  开始考试点击查看答案
• 5Which two statement is true concerning dropping a pluggable database (PDB)、

  A.The PDB must be open in read-only mode.

  B.The PDB must be in mount state.

  C.The PDB must be unplugge

  D.D.The PDB data files are always removed from disk.

  E.A dropped PDB can never be plugged back into a multitenant container database (CDB).

  开始考试点击查看答案
• 6An 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

  开始考试点击查看答案
• 7You 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.

  开始考试点击查看答案
• 8You 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).

  开始考试点击查看答案
• 9You 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

  开始考试点击查看答案
• 10Your 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

  开始考试点击查看答案