单项选择题
A.Applications A and B will cause a deadlock situation
B.Application B will read the previous version of the row
C.Application B will read the row and see uncommitted changes made by application A
D.Application B will be placed in a lock-wait state until application A releases its lock
单项选择题 How does DB2 protect the integrity of indexes when data is updated?（）
单项选择题 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?（）
单项选择题 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?（）