98. Which two statements about bigfile tablespaces are true? (Choose two.)
A) The bigfile tablespace have only one data file.
B) The segment space management is automatic.
C) The extent management is dictionary managed.
D) The database can have only one bigfile tablespace.
E) The bigfile tablespace can be converted to a smallfile tablespace.
答案：AB
BIGFILE--BIGFILE有且只有一个数据文件(why?多个没必要还是不便于管理?)
--BIGFILE的段空间是自动管理的
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