About Question enthuware.oce-jpad.v6.2.368 :

[alex]

Hi,

Please check the quetsion
There are 4 valid values for em.lock(obj, LockModeType type)

Why you think that valid only em.lock(obj, LockModeType.OPTIMISTIC); ??
What about em.lock(obj, LockModeType.PESSIMISTIC_WRITE) and em.lock(obj, LockModeType.PESSIMISTIC_READ);

[admin]

The question is not about valid values. It is about the equivalence of the values. Please see the detailed explanation given with the question.