OCP 1Z0 053 35

35.You want the Automatic SQL Tuning process to stop accepting and implementing the recommended 
SQL profiles automatically. Which action would you perform to achieve this? 
A. Edit the automatic maintenance window group configuration. 
B. Set the CURSOR_SHARING parameter to EXACT for the database instance. 
C. Use the DBMS_SQLTUNE.SET_TUNING_TASK_PARAMETERS procedure to set 
ACCEPT_SQL_PROFILES to FALSE.  
D. Set the SQLTUNE_CATEGORY parameter to DEFAULT for the database instance. 
Answer: C 

Tests SQL profiles by executing the SQL statement

If a SQL profile is recommended, the database tests the new profile by executing the SQL statement both with and without the profile. If the performance improvement improves at least threefold, then the database accepts the SQL profile, but only if the ACCEPT_SQL_PROFILES task parameter is set to TRUE. Otherwise, the automatic SQL tuning reports merely report the recommendation to create a SQL profile.

You can alter attributes of an existing SQL profile with the ALTER_SQL_PROFILE procedure. Modifiable attributes are STATUS, NAME, DESCRIPTION, and CATEGORY.

The CATEGORY attribute determines which sessions can apply a profile. You can view the CATEGORY attribute by querying DBA_SQL_PROFILES.CATEGORY. By default, all profiles are in the DEFAULT category, which means that all sessions in which the SQLTUNE_CATEGORY initialization parameter is set to DEFAULT can use the profile.

By altering the categoryof a SQL profile, you can determine which sessions are affected by profile creation. For example, by setting thecategory to DEV, only sessions in which the SQLTUNE_CATEGORY initialization parameter is set to DEV can use the profile. Other sessions do not have access to the SQL profile and execution plans for SQL statements are not impacted by the SQL profile. This technique enables you to test a profile in a restricted environment before making it available to other sessions.