There are two transactions happening here
T1: The application performs an insert (inventory database), then put message on JMS
T2: The message-driven bean performs an insert (sales database), using JMS message from the queue
A. The message-driven bean does not perform an insert, the application does not perform an insert.
VALID:
T1: T1 insert fails then T1 rolls back, so message is put and appears on queue
T2: Message will not be available to T2, so no insert will happen
B. The message-driven bean performs an insert, the application performs an insert.
VALID:
T1: T1 insert successfully completes, so message is put and appears on queue
T2: T2 reads message and successfully completes
C. The message-driven bean does not perform an insert, the application performs an insert.
VALID:
T1: T1 insert successfully completes, so message is put and appears on queue
T2: T2 reads message and tries to insert but fails
D. The message-driven bean performs an insert, the application does not.
INVALID
T1: T1 insert fails then T1 rolls back, so message is put and appears on queue
T2: Message will not be available to T2, so no insert will happen. Hence invalid.
The question is
"Which statement cannot be a valid outcome of this transaction"
Answer is "D"