12. If several sessions request an exclusive lock on the same row, what will
happen? (Choose the best answer.)
A. The first session will get the lock; after it releases the lock there is a
random selection of the next session to get the lock.
B. The first session will get an exclusive lock, and the other sessions will get
shared locks.
C. The sessions will be given an exclusive lock in the sequence in which they
requested it.
D. Oracle will detect the conflict and roll back the statements that would
otherwise hang.
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