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.
Explanation:
SCN
System Change Number. A database ordering primitive.
The value of an SCN is the logical point in time at which changes are made to a database.
Refer to v11.2 document