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单选题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 baselin

题目
单选题
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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第1题：

Which of the following cannot be used as input to the SQL Tuning Advisor?() (Choose all that apply.)

A. A single SQL statement provided by a user

B. An existing SQL Tuning Set (STS)

C. A preprocessed Database Replay workload

D. A schema name

E. SQL statement identified in EM as using excessive resources


参考答案：C, D

第2题：

You installed Oracle Database 11g and are performing a manual upgrade of the Oracle9i database. As a part of the upgrade process, you execute the following script: SQL>@utlu111i.sql Which statement about the execution of this script is true?（）

  • A、It must be executed from the Oracle Database 11g environment.
  • B、It must be executed only after the SYSAUX tablespace has been created.
  • C、It must be executed from the environment of the database that is being upgraded.
  • D、It must be executed only after AUTOEXTEND is set to ON for all existing tablespaces.
  • E、It must be executed from both the Oracle Database 11g and Oracle Database 9i environments.

正确答案:C

第3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


参考答案：A

第4题：

Your organization decided to upgrade the existing Oracle 10g database to Oracle 11g database in a multiprocessor environment. At the end of the upgrade，you observe that the DBA executes the following script：   SQL> @utlrp.sql   What is the significance of executing this script？（）  

  • A、 It performs parallel recompilation of only the stored PL/SQL code.
  • B、 It performs sequential recompilation of only the stored PL/SQL code.
  • C、 It performs parallel recompilation of any stored PL/SQL as well as Java code.
  • D、 It performs sequential recompilation of any stored PL/SQL as well as Java code.

正确答案:C

第5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.

正确答案:C

第6题：

Your database supports a DSS workload that involves the execution of complex queries: Currently, the library cache contains the ideal workload for analysis. You want to analyze some of the queries for an application that are cached in the library cache. What must you do to receive recommendations about the efficient use of indexes and materialized views to improve query performance?（）

  • A、Create a SQL Tuning Set (STS) that contains the queries cached in the library cache and run the SQL Tuning Advisor (STA) on the workload captured in the STS.
  • B、Run the Automatic Workload Repository Monitor (ADDM).
  • C、Create an STS that contains the queries cached in the library cache and run the SQL Performance Analyzer (SPA) on the workload captured in the STS.
  • D、Create an STS that contains the queries cached in the library cache and run the SQL Access Advisor on the workload captured in the STS.

正确答案:D

第7题：

You upgraded from a previous Oracle database version to Oracle Database version to Oracle Database12c. Your database supports a mixed workload. During the day, lots of insert, update, and deleteoperations are performed. At night, Extract, Transform, Load (ETL) and batch reporting jobs are run. The ETL jobs perform certain database operations using two or more concurrent sessions.After the upgrade, you notice that the performance of ETL jobs has degraded. To ascertain the cause ofperformance degradation, you want to collect basic statistics such as the level of parallelism, totaldatabase time, and the number of I/O requests for the ETL jobs. How do you accomplish this?（）

  • A、Examine the Active Session History (ASH) reports for the time period of the ETL or batch reporting runs.
  • B、Enable SQL tracing for the queries in the ETL and batch reporting queries and gather diagnostic data from the trace file.
  • C、Enable real-time SQL monitoring for ETL jobs and gather diagnostic data from the V$SQL_MONITOR view.
  • D、Enable real-time database operation monitoring using the DBMS_SQL_MONITOR.BEGIN_OPERATION function, and then use the DBMS_SQL_MONITOR.REPORT_SQL_MONITOR function to view the required information.

正确答案:D

第8题：

You want to analyze a SQL Tuning Set (STS) using SQL Performance Analyzer in a test database. Which two statements are true regarding the activities performed during the test execution of SQLs in a SQL Tuning Set?（）

A.Every SQL statement in the STS is considered only once for execution

B.The SQL statements in the STS are executed concurrently to produce the execution plan and execution statistics

C.The execution plan and execution statistics are computed for each SQL statement in the STS

D.The effects of DDL and DML are considered to produce the execution plan and execution statistics


参考答案：A, C

第9题：

You installed Oracle Database 11g and are performing a manual upgrade of the Oracle9i database. As a part of the upgrade process，you execute the following script：   SQL>@utlu111i.sql   Which statement about the execution of this script is true？（）

  • A、 It must be executed from the Oracle Database 11g environment.
  • B、 It must be executed only after the SYSAUX tablespace has been created.
  • C、 It must be executed from the environment of the database that is being upgraded.
  • D、 It must be executed only after AUTOEXTEND is set to ON for all existing tablespaces.
  • E、 It must be executed from both the Oracle Database 11g and Oracle Database 9i environments.

正确答案:C

第10题：

Which of the following cannot be used as input to the SQL Tuning Advisor?（） (Choose all that apply.)

  • A、A single SQL statement provided by a user
  • B、An existing SQL Tuning Set (STS)
  • C、A preprocessed Database Replay workload
  • D、A schema name
  • E、SQL statement identified in EM as using excessive resources

正确答案:C,D

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