Lasse, Really, I dont Know the answers. I think that portability is not the answer correct, because there is nothing relationship with other plataform. Support to object oriented DB too (in my opinion) there is nothing relationship with DB. than, my answer are (b) and (c). Maybe with a limit number of connection of pool (pool size), it limit the creating ilimited number of connection. Is it true??? . Are the correct answer correct ?
Hmm. I answered a bit too hastily, it seems. Sorry for that. "Decrease allocation of memory" is very likely a correct answer because the pool limits the number of existing bean instances to a configured maximum and, on the other hand, creating bean instances happens only when exceptions force the container to remove an existing bean (if this counts as a "decrease"). Pooling EJB instances does not have anything to do with pooling database connections. At least as far as I can think of. The other two options are also definitely wrong answers.