053-004

4.Which three components does the Scheduler use for managing tasks within the Oracle environment?
(Choose three.)
A. a job
B. a program
C. a schedule
D. a PL/SQL procedure
Answer: ABC

解析:

To use the Scheduler, you create?Scheduler objects. Schema objects define the what, when, and where for job scheduling. Scheduler objects enable a modular approach to managing tasks. One advantage of the modular approach is that objects can be reused when creating new tasks that are similar to existing tasks.

The principal Scheduler object is the job. A?job?defines the action to perform, the schedule for the action, and the location or locations where the action takes place. Most other scheduler objects are created to support jobs.

看起来和答案无关,不过这题很容易记住的.

参考:
http://docs.oracle.com/cd/E11882_01/server.112/e25494/schedover.htm