多选题Identify the two direct sources from where SQL plans can be loaded into the SQL plan baselines.（）ACursor cacheBStored outlineCSQL Tuning SetDAutomatic Workload Repository (AWR) snapshots

第1题：

When executing a SQL workload, you choose to generate execution plans only, without collecting execution statistics. Which two statements describe the implications of this? （）(Choose two.)

• A、It produces less accurate results of the comparison analysis.
• B、It automatically calls the SQL Tuning Advisor for recommendations.
• C、It shortens the time of execution and reduces the impact on system resources.
• D、Only the changes in the execution plan, and not performance regression, are detected.

第2题：

Which two statements are true about the Automatic Workload Repository （AWR）（）

• A、All AWR tables belong to the SYSTEM schema.
• B、The AWR contains systemwide tracing and logging information.
• C、The snapshots collected by the AWR are accessible through data dictionary views.
• D、The snapshots collected by the AWR are used by self-tuning components in the database.

第3题：

Your system has been upgraded from Oracle Database 10g to Oracle Database 11g. You imported SQL Tuning Sets （STS） from the previous version. After changing the  OPTIMIZER_FEATURE_ENABLE parameter to 10.2.0.4 and running the SQL Performance Analyzer， you observed performance regression for a few SQL statements.  What would you do with these SQL statements？（）

• A、 Set OPTIMIZER_USE_PLAN_BASELINES to FALSE to prevent the use of regressed plans.
• B、 Capture the plans from the previous version using STS and then load them into the stored outline.
• C、 Capture the plans from the previous version using STS and then load them into SQL Management Base （SMB）
• D、 Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to FALSE to prevent the plans from being loaded to the SQL plan baseline.

第4题：

You work as a database administrator for Certkiller .com. You have set the retention period for Automatic Repository （AWR） statistics to four days and collection interval to 15 minutes. You want to view the statistics collected and stored in AWR snapshot. Which two methods would you use to view the AWR statistics？（）

• A、use enterprise manager
• B、use DBMS_SQL package
• C、use DBMS_AWR package
• D、use PRVT_WORKLOAD package
• E、query the AWR snapshot repository objects
• F、use DBMS_WORKLOAD_REPOSITORY package

第5题：

Identify the activities performed as part of the Automatic SQL Tuning process in the maintenance window?（）

• A、generating the SQL profile
• B、testing and accepting the SQL profile
• C、generating a list of candidate SQLs for tuning
• D、adding tuned SQL plans into the SQL plan baseline
• E、tuning each SQL statement in the order of importance
• F、generating baselines that include candidate SQLs for tuning

第6题：

Identify the activities performed as part of the Automatic SQL Tuning process in the maintenance window？（）

• A、 generating the SQL profile
• B、 testing and accepting the SQL profile
• C、 generating a list of candidate SQLs for tuning
• D、 adding tuned SQL plans into the SQL plan baseline
• E、 tuning each SQL statement in the order of importance 
• F、 generating baselines that include candidate SQLs for tuning

第7题：

You received complaints about the degradation of SQL query performance. You identified top SQL queries that consume time. What would be your next step to find out recommendations about statistics collection and restructuring of the SQL statement to improve query performance？（）

• A、run Segment Advisor
• B、run SQL Tuning Advisor on top SQL statements
• C、run the Automatic Workload Repository （AWR） report
• D、run the Automatic Database Diagnostic Monitor （ADDM）on top SQL statements

第8题：

Which statement describes the effect of the execution of the above PL/SQL block?（）

• A、The plan baselines are verified with the SQL profiles.
• B、All fixed plan baselines are converted into nonfixed plan baselines.
• C、All the nonaccepted SQL profiles are accepted into the plan baseline.
• D、The nonaccepted plans in the SQL Management Base are verified with the existing plan baselines.

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第13题：

You plan to collect the Automatic Workload Repository （AWR） data every Monday morning for a month. You want Oracle Database to automatically create a baseline every Monday and remove the old baseline.  What is the correct action to achieve this？（）  

• A、 Create and populate a SQL Tuning Set from the AWR on every Monday.
• B、 Change the RETENTION setting for the AWR snapshots to 7 days on Monday.
• C、 Create a repeating baseline template.
• D、 Insert a finding directive for future ADDM tasks.

第14题：

You work with a newly created database. Presently, there is no application load on the database instance.You want to create a baseline for tuning the application, so you decide to collect recommendations that can be implemented to improve application performance.What action must you take to achieve this?（）

• A、Run Segment Advisor
• B、Run the SQL Tuning Advisor (STA)
• C、Run the Automatic Workload Repository (AWR) report
• D、Run the SQL Access Advisor with a hypothetical workload

第15题：

Examine the following PL/SQL block：   DECLARE   my_plans pls_integer； BEGIN  my_plans ：= DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE （sql_id=> ？9twu5t2dn5xd？； END；   Which statement is true about the plan being loaded into the SQL plan baseline by the above command？（）

• A、 It is loaded with the FIXED status.
• B、 It is loaded with the ACCEPTED status.
• C、 It is not loaded with the ENABLED status.
• D、 It is not loaded with the ACCEPTED status.

第16题：

Which three are the valid statements in relation to SQL plan baselines？（）

• A、 The plans can be manually loaded to the SQL plan baseline.
• B、 The plans in the SQL plan baseline are verified and accepted plans.
• C、 The plans generated for every SQL statement are stored in the SQL plan baseline by default. 
• D、 The plan baselines are stored temporarily in the memory as long as the database instance is running.
• E、 For the SQL plan baselines to be accessible to the optimizer， the SYSAUX tablespace must be online.

第17题：

Identify the two direct sources from where SQL plans can be loaded into the SQL plan baselines.（）

• A、 Cursor cache
• B、 Stored outline
• C、 SQL Tuning Set
• D、 Automatic Workload Repository （AWR） snapshots

第18题：

Which three statements about performance analysis by SQL Performance Analyzer are true？（）

• A、 It detects changes in SQL execution plans.
• B、 It produces results that can be used to create the SQL plan baseline.
• C、 The importance of SQL statements is based on the size of the objects accessed.
• D、 It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.
• E、 It shows only the overall impact on workload and not the net SQL impact on workload.

第19题：

You perform the following activities during the database upgrade from Oracle Database 10g to Oracle Database 11g: 1. Capture plans for a SQL workload into a SQL Tuning Set (STS) before upgrade. 2. Load these plans from the STS into the SQL plan baseline immediately after the upgrade. What is the reason for performing these activities? （）

• A、to minimize plan regression due to the use of a new optimizer version
• B、to completely avoid the use of new plans generated by a new optimizer version
• C、to prevent plan capturing when the SQL statement is executed after the database upgrade
• D、to keep the plan in the plan history so that it can be used when the older version of the optimizer is used

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