單項(xiàng)選擇題

How does DB2 protect the integrity of indexes when data is updated?（）

A.Locks are acquired on the data.
B.Locks are acquired on index keys.
C.Locks are acquired on index pages.
D.Locks are acquired on index pointers.

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單項(xiàng)選擇題

If DB2 detects a deadlock between application A and application B (each waiting for a lock held by the other one), what action will DB2 take?（）

A.Rollback the transaction in both applications.
B.Rollback the transaction in one of the two applications.
C.Decrease the lock timeout value for both applications, thereby causing a lock timeout situation.
D.Send a message to let the administrator know of the situation and decide which application or applications should be terminated.

單項(xiàng)選擇題

If an application issues the same query more than once in the same Unit of Work, which isolation level will not permit this application to see additional rows inserted by other applications?（）

A.Read Stability (RS)
B.Repeatable Read (RR)
C.Uncommitted Read (UR)
D.Cursor Stability (CS)