OCP 1Z0 053 216

216.Which three elements can a job chain process involve? (Choose three) 
A. an event 
B. a schedule 
C. a program 
D. another chain 
E. a lightweight job 
Answer: BDE 

http://docs.oracle.com/cd/E11882_01/server.112/e25494/scheduse.htm#ADMIN12458

Defining Chain Steps

After creating a chain object, you define one or more chain steps. Each step can point to one of the following:

• A Scheduler program object (program)

• Another chain (a nested chain)

• An event schedule, inline event, or file watcher