Oracle OCP 19c 认证1Z0-083考试(第66题)

Posted 2022-12-13 wwwleoocom

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.

Answer: BCF

(解析:有关会话等待的信息都包含在上面显示的视图中。)