4.Which four are true about creating and running a remote database scheduler jobs?
A) A credential is optional for a remote database job.
B) A database destination group must exist or be created for a job to run on multiple remote databases.
C) A destination is optional for a remote database job because DB links can be used instead.
D) It must run as a user that is defined on the remote database.
E) A credential must be created to define the remote user.
F) Remote database jobs always run as the same user who submits the Job on the local database.
G) A database destination must exist or be created for the remote database.
Answer：BDEG
(解析：Database Destination (数据库路径),通过 CREATE_DATABASE_DESTINATION 创建，在 CREATE_JOB 中作为一个输入参数，用来执行远程调度。redential (证书),证书用来保存 OS 或者数据库的用户密码，在执行 External Job 或者远程数据库作业时使用。ocp讨论3组：1015267481 验证ocp)
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