create tablespace test datafile 'E:\APP\ORADATA\ASHTEST\TEST01.dbf' size 100m autoextend on next 10m;

create user test identified by test 
DEFAULT tablespace test
temporary tablespace temp
quota unlimited on test;

grant dba to test;

SQL> select file_name, bytes/1024/1024 bytes_mb  from dba_data_files
  2  where tablespace_name ='TEST';

FILE_NAME                                            BYTES_MB
-------------------------------------------------- ----------
E:\APP\ORADATA\ASHTEST\TEST01.DBF                         100

Export: Release 11.2.0.1.0 - Production on Thu Nov 20 19:02:52 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
;;; 
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_EXPORT_SCHEMA_01":  system/******** dumpfile=expdp_TEST.dmp logfile=expdp_TEST.log directory=dp_dir schemas=TEST compression=none 
Estimate in progress using BLOCKS method...

Export: Release 11.2.0.1.0 - Production on Thu Nov 20 19:32:06 2014

Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
;;; 
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Starting "SYSTEM"."SYS_EXPORT_SCHEMA_01":  system/******** dumpfile=expdp_TEST_without_compression.dmp logfile=expdp_TEST_without_compression.log directory=dp_dir schemas=TEST 

select round(sum(bytes)/1024/1024) from dba_segments where owner='TEST';

SQL> select round(sum(bytes)/1024/1024) from dba_segments where owner='TEST';

ROUND(SUM(BYTES)/1024/1024)
---------------------------
                        237

select tablespace_name, round(sum(bytes)/1024/1024) 
from dba_segments 
where owner='TEST'
group by tablespace_name;