4. þ D. There is always a database-wide default, which (by default) is SYSTEM.
In many cases, it will have been set to TEMP.
ý A, B, C, and E. A is wrong because there is a default. B is wrong because
the default may not be SYSTEM (though it is by default). C is wrong because
while TEMP is a frequently used default, it may not be. E is wrong because all
user accounts must have a temporary tablespace.
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