100.In which situations does the Oracle Data Pump use external tables and not the direct path load w

100.In which situations does the Oracle Data Pump use external tables and not the direct path load while
exporting a table? (Choose all that apply.)
A.if a table is not in a cluster
B.if a table has an active trigger
C.if a table has an encrypted column
D.if a table has a column of data type LONG defined on it
E.if a table has a referential integrity constraint defined on it
答案：BCE
参考：https://docs.oracle.com/cd/B19306_01/server.102/b14215/dp_overview.htm#i1010293
The default method that Data Pump uses for loading and unloading data is direct path, when the structure of a table allows it. Note that if the table has any columns of datatype LONG, then direct path must be used.（排除D)
Situations in Which Direct Path Load Is Not Used
A table is in a cluster(排除A)
  There is an active trigger on a pre-existing table. (B正确)
  The table has encrypted columns(C正确)
A referential integrity constraint is present on a pre-existing table.(E正确)
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