oracle ocp 19c考题8，科目082考试题-logical and physical database structures

Which three statements are true concerning logical and physical database structures? (Choose three.)

A. All tablespaces may have one or more data files

B. The extents of a segment must always reside in the same datafile

C. A smallfile tablespace might be bigger than a bigfile tablespace

D. A segment can span multiple data files in some tablespaces

E. A segment’s blocks can be of different sizes

F. A segment might have only one extent

G. Segments can span multiple tablespsaces

Source：cuug