Can db file be reused automatically

Hi ,
i am using Oracle 8i 8.1.7
I have this tablespace called "tspc1"
and the tablespace has 5 db files and one of the tables is table1
ques :
1. the data in table1 can span across mutliple db files though each record can only be in 1 db file ?
2. this table has 100M records, with first record dated back to Y2K , and assuming that this record resides in db file 1 and if i now delete the records in Y2K , will oracle save new rows into db file 1 assuming now it's using db file 5 ?
if not , how can i point the table to be using that particular file ?
pls advise
rgds

<<snip>>
ques :
1. the data in table1 can span across mutliple db
files though each record can only be in 1 db file ?-- Mostly true. If the row length is > than will fit on one block, it will span to an additional block which could be in a different data file.
2. this table has 100M records, with first record
dated back to Y2K , and assuming that this record
resides in db file 1 and if i now delete the records
in Y2K , will oracle save new rows into db file 1
assuming now it's using db file 5 ?
if not , how can i point the table to be using
that particular file ? -- Blocks that have had rows deleted will be reused if sufficient space is made available. You do not need to do anything to direct the database to reuse the blocks. If you are using DMT, the block will go on the freelist to be reused when the amount of space used falls below the pct_used setting for the table, If you are using LMTs, the block will be marked as available immediately. Of course, if you are using +APPEND, then no blocks will be reused because rows will be added at the high water mark.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

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