1Z0-053單項(xiàng)選擇題每日一練(2019.11.04)

Consider the following scenario for your database:
- Backup optimization is enabled in RMAN.
- The recovery window is set to 7 days in RMAN.
- The most recent backup to disk for the TOOLS tablespace was taken on November 3, 2007.
- The TOOLS tablespace is read-only since November 4, 2007.
On November 23, 2007, you issue the RMAN command to back up the database to disk.
Which statement is true regarding the backup of the TOOLS tablespace?（）

Examine the following PL/SQL block：  
SET SERVEROUTPUT ON SET LONG 10000 ECLARE report clob； 
BEGIN report ：= DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE（）；
DBMS_OUTPUT.PUT_LINE（report）；
END；  
Which statement describes the effect of the execution of the above PL/SQL block？（）