Oracle OCP 19c 认证1Z0-083考试题库(第21题)

时间：2021-05-21 来源：

Oracle OCP 19c 认证1Z0-083考试题库(第21题)-CUUG内部学员版083题库解析

21、Which three are true about monitoring waits for sessions and services? (Choose three.)

A. V$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.

B. V$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.

C. V$SESSION_WAIT _CLASS displays waits broken down by wait class only for waiting sessions.

D. V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.

E. V$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.

F. V$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.