44题、choose three
Which three statements are true about a job chain?
A) It can be executed using time-based schedules.
B) It cannot invoke the same program or nested chain in multiple steps in the chain.
C) The DBA role is required to create a job chain
D) It can be executed using event-based schedules.
E) It can be used to implement dependency-based scheduling.
F) It cannot have more than one dependency.
Answer：ADE
(解析：job chain可以基于时间、事件或者基于依赖行的工作计划。来自3组：1015267481)