第29題、choose one
Examine the parameters for a database instance:
NAME TYPE VALUE
temp_undo_enabled boolean TRUE
undo_ management string AUTO
undo _retention Integer 900
undo _tablespace string UNDOTBS1
Your database has three undo tablespaces and the default undo tablespace is not autoextensible.
Resumable space allocation is not enabled for any sessions in the database instance.
What is the effect on new transactions when all undo space in the default undo tablespace is in use by active transactions?
A) Transactions wait until space becomes available in UNDOTBS1.
B) Transactions write their undo in a temporary tablespace.
C) Transactions fail.
D) Transactions write their undo in the SYSTEM undo segment.
Answer：C
(解析：該題故意弄了幾個參數的值，特別是temp_undo_enabled，然後告訴我們Resumable space功能沒有打開，以及默認undo表空間都用完了，那麼新的事務就會失敗。來自3組：1015267481)