ocp-180

QUESTION NO: 180
What does the SCN represent?
A. The system change number, which is a point in time relative to transactions within a given database.

B. A number that represents time. Thus, at 1300 hours, the SCN is the same on all databases.
C. The security change number, which represents the security code that is needed to access any
database structure.
D. A conversion factor that converts internal database time to external clock time.
E. UTC time in the database, providing a standardized way of tracking time in Oracle.
Answer: A

SCN代表什么？

A.系统改变号，它是一个在一个给定的数据库中涉及事务的时间点。