OCP 1Z0 052 52

52. View the Exhibits and examine lock waits.



Users HR and SH complain that their transactions on one of the application tables, EMP, are waiting for

response.

Which action would you take to release the lock and enable users HR and SH to continue with their

transactions?

A.Kill the session of the user SCOTT with session ID118.

B.Issue manual checkpoint using the ALTER SYSTEM command.

C.Modify the profile used by user SCOTT to reduce the CONNECT_TIME limit.

D.Flush the Shared Pool to remove the SQL statement causing "wait" in memory.

Answer: A

scott session_id = 118 阻塞了其它两个会话，kill掉118 （当然，你能找到是谁在用118，也可能通知他rollback或commit）