When reviewing a customer's database configuration, you find thatOPTIMIZER_USE_SQL_PLAN_BASELINESis set asTRUE. What does the Optimizer do?
A. compares plans that itdevelops with accepted plans in baselines
B. develops plans and adds them to baselines as verified
C. doesn't develop an execution plan, but uses an accepted plan from baselines
D. doesn't develop an execution plan, but uses enabled plans in the baseline
Which are two characteristics of "invisible" index functionality that would help tune a database having thousands of legacy indexes?
A. An invisible index is ignored by the optimizer.
B. After an index becomes invisible, it is no longer maintained during insertsand updates.
C. I/O bottlenecks are easy to spot when invisible indexes are used.
D. An index only needs to be rebuilt for it to be visible again.
E. The session or system parameter needs to be changed toOPTIMIZER_USE_INVISIBLE_INDEXEStoTRUEfor an invisible index to become visible to the Optimizer.
A customer seeks capability to measure and test database performance before and after application changes. Which would you implement to meet that requirement?
A. Oracle Performance Analyzer
B. Oracle Application Performance Analyzer
C. Oracle Real Application Testing
D. Oracle SQL Developer
E. Oracle Spatial and Graph
A customer asked you about Database Time (DB Time). Which are two correct statements you would include in your description of it?
A. It is the total time spent in database calls by all sessions in the database.
B. It is the total time spent in database calls by foreground sessions in the database.
C. It is the total time spent in database calls by background sessions in the database.
D. It includes non-idle wait time.
E. It is the overall response time.
F. It includes login, idle, background, and Zombie session wait time.
SQL Access Advisor takes database workload as input and recommends adding various access structures. Which three does it consider the impact of adding when it generates recommendations?
A. Materialized views
B. Indexes
C. Partitions
D. Tablespaces
E. V$ performance views
F. Hints
Which one is a type of user session and client request supported by Database Replay?
A. XA transactions
B. Oracle Call Interface (OCI) based object navigations
C. SQL-based object access
D. Flashback queries
E. Database Resident Connection Pooling (DRCP)
What two statements are true when you are using SQL Tuning Advisor and create a SQL Profile to improve performance of a SQL statement issued by a packaged application?
A. You need to regularly run SQL Tuning Advisor to verify if the SQL Profile can be replaced with a better one.
B. After a SQL Profile is created, it will then run efficiently for the life of the database.
C. The SQL Profile rewrites the SQL Statement issued by theapplication so it appears to the Optimizer as aperfectly written SQL statement.
D. You can have only one SQL Profile active at one time for a single SQL statement.
E. You need Oracle Database 12c or later to use SQL Profiles.
F. SQL Profiles can be used for non-Oracle databases like Microsoft SQL Server, if the Tuning Pack islicensed.
When implementing an Oracle Database Performance and Tuning solution, which are three product technologies recommended for use as your base configuration?
A. SQL Tuning Pack for Oracle Database
B. Oracle Tuning Pack for Oracle Database
C. Oracle Performance Pack for Oracle Database
D. Oracle Diagnostics Pack for Oracle Database
E. Oracle Real Application Testing
F. Oracle SQL Developer
G. STATSPACK
Which four use cases could Database Replay be used to test for database performance changes?
A. a change in operating system versions
B. compare Flashback workload
C. check a workload from a single instance on an Oracle RAC database
D. check a workload after database parameters have been changed
E. check a workload from one database release on another database released
F. upgrade an application
Which action can beperformed by using Oracle Enterprise Manager Database Express Performance Hub?
A. View health status and performance of an Oracle Database instance via Database Control.
B. Launch and view STATSPACK reports.
C. View real-time and historical Oracle Database performance information.
D. View only real-time Oracle Database performance information.
E. View only historical Oracle Database performance information.
F. Consolidate ADDM, AWR, and ASH repositories within an enterprise and enable centralized performancereporting.
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