In your Oracle 12c database, you plan to execute the command:
SQL> CREATE TABLESPACE tbsl DATAFILE ‘/u02/oracle/data/tbs0l.dbf‘ SIZE 50M;
The u02 file system has 1 GB of free space available.
What is the outcome?
A) It raises an error because extent management is not specified.
B) It creates a locally managed tablespace with automatic segment space management enabled.
C) It creates a dictionary-managed tablespace with manual segment space management enabled.
D) It creates a locally managed tablespace with manual segment space management enabled.
Answer：B
(解析：从10g开始，创建的表空间默认就是本地管理ASSM的表空间。来自3组：1015267481)
原文：https://blog.51cto.com/13854012/2385163