053(四十二）

206、

206.Which statements are true regarding the Query Result Cache? (Choose all that apply.)
A. It can be set at the system, session, or table level.
B. It is used only across statements in the same session.
C. It can store the results from normal as well as flashback queries.
D. It can store the results of queries based on normal, temporary, and dictionary tables.

207、

207.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? (Choose two.)
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.

208、

208.You want to enable resumable space allocation at the instance level. Which two actions would enable resumable space allocation at the instance level? (Choose two.)
A. issuing the ALTER SYSTEM ENABLE RESUMABLE; statement
B. issuing the ALTER SESSION ENABLE RESUMABLE; statement
C. modifying the RESUMABLE_TIMEOUT initialization parameter to a nonzero value
D. issuing the ALTER SYSTEM SET RESUMABLE_TIMEOUT=<nonzero value>; statement

209、

209.You executed the following commands:
SQL> ALTER SESSION SET OPTIMIZER_USE_PENDING_STATISTICS = false; SQL> EXECUTE 
DBMS_STATS.SET_TABLE_PREFS('SH', 'CUSTOMERS', 'PUBLISH','false'); SQL> EXECUTE 
DBMS_STATS.GATHER_TABLE_STATS('SH', 'CUSTOMERS');
Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session?
A. The statistics are stored in the pending statistics table in the data dictionary.
B. The statistics are treated as the current statistics by the optimizer for all sessions.
C. The statistics are treated as the current statistics by the optimizer for the current sessions only.
D. The statistics are temporary and used by the optimizer for all sessions until this session terminates.

210、

210.The Database Resource Manager is automatically enabled in the maintenance window that runs the Automated Maintenance Task. What is the reason for this?
A. to prevent the creation of an excessive number of scheduler job classes
B. to allow the Automated Maintenance Tasks to use system resources without any restriction
C. to allow resource sharing only among the Automated Maintenance Tasks in the maintenance window
D. to prevent the Automated Maintenance Tasks from consuming excessive amounts of system resources