OCP认证052考试最新题库及答案整理-51

51、Examine this query and its output: SQL> select sid,event,blocking_session from v$session where blocking_session is not null; SID EVENT BLOCKING_SESSION ---- --------------------------- ---------------- 105 enq:TX - row lock contention 15 Which two are true? A. The blocked session is waiting on a shared table lock. B. The blocked session is waiting on an enqueue. C. The blocking session is waiting on a row-level lock. D. Session 105 is blocked by session 15. E. Session 105 is blocking session 15. Correct Answer: BD 北京CUUG整理，转载请注明，OCP讨论群：569933648/836361015