Languages-Java [3i Infotech Placement]: Sample Questions 98 - 99 of 141
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Question 98
Appeared in Year: 2004
Question MCQ▾
Stateless session bean is instantiated by
Choices
Choice (4) | |
---|---|
a. | New Instance () |
b. | Create () |
c. | None of the above |
d. | Question does not provide sufficient data or is vague |
Answer
b.Explanation
When an instance transits from non-exist state to method ready pool three operations are performed:
- Bean instance is instantiated by invoking the class. new Instance () method on stateless session bean.
- In stateless session beans calling create () method results in creating EJB object for the client.
- Ejb Create () of a stateless bean is invoked once in the life cycle of a particular instance.
Question 99
Write in Short Short Answer▾
What is the exact difference in between unicast and multicast object? Where will used?
EditExplanation
Unicast | Multicast |
One machine is talking to only one other machine | Packet is sent from one machine to one or more machines |
Sender sends the data stream to a single receiver at a time. | Sender and the interested receivers communicate. |
One to one communication. | One to many communication. |
Information is sent from one point to another point. | Information is sent from one or more points to a set of other points. |