IF A TABLESPACE HAS SEVERAL DATAFILES, SEGMENTS CAN HAVE EXTENTS IN ALL OF THEM
10.
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C. If a tablespace has several datafiles, segments can have extents in all
of them.
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A, B, and D. A is wrong because one extent consists of consecutive
block in one datafile. B is wrong because one segment can only exist in one
tablespace (though one tablespace can contain many segments). D is wrong
because while this can certainly be done, one block can only exist in one
datafile.