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Question 16 :

What is POA ?

Answer :

Portable Object Adapter. A CORBA standard for building server-side applications that are portable across heterogeneous ORBs.


Question 17 :

What is point-to-point messaging system ?

Answer :

A messaging system built on the concept of message queues. Each message is addressed to a specific queue; clients extract messages from the queues established to hold their messages.


Question 18 :

What is primary key ?

Answer :

An object that uniquely identifies an entity bean within a home.


Question 19 :

What is principal ?

Answer :

The identity assigned to a user as a result of authentication.


Question 20 :

What is privilege ?

Answer :

A security attribute that does not have the property of uniqueness and that can be shared by many principals.