Hey prasanna,

In my company we follow the same approach.

I am sure you would not be involved in all these three layers as such but yes to have knowledge of the overall working is good.
User Interface Layer-- has all your HTML, CSS, Javascript, JSPs involved
Business Objects layer has all you business logic, Beans.. EJBs if you guys are using that.
Data Access Layer-- is actually DAO calls which can be through JDBC or Hibernate and if you use EJBs then that is included in it.
Tell me exactly what your responsibility in job is.

Kunal