Question 11 :
How can a servlet refresh automatically if some new data has entered the database?
You can use a client-side Refresh or Server Push.
Question 12 :
The code in a finally clause will never fail to execute, right?
Using System.exit(1); in try block will not allow finally code to execute.
Question 13 :
How many messaging models do JMS provide for and what are they?
JMS provide for two messaging models, publish-and-subscribe and point-to-point queuing.