Answer Posted / sivasubramanian.k

Session Tracking is one of the most powerful features of
Servlets and JSP. Basically, the servlet engine takes care
of using Cookies in the right way to preserve state across
successive requests by the same user. Your servlet just
needs to call a single method (getSession) and it has
access to a persistent hashtable of data that's unique to
the current user

public void doPost(HttpServletRequest request,
HttpServletResponse response){
...
//lets take the session obj
HttpSession session = request.getSession(true);
//now let us take the user name assosiated with this session
String currUserLogin = (String) session.getAttribute
("currentUserLogin")
...
//now we do the work according to the user name
doSomeWork(currUserLogin);
...

}

How many bits is a string?

987

---

How is abstraction implemented in java ?

989

---

What class allows you to read objects directly from a stream?

1318

---

What is the method overriding?

1082

---

Does java allow overriding static methods ?

1109

---

Explain the differences between static and dynamic variables?

1141

---

What are the main differences between the java platform and other platforms?

1047

---

What is the purpose of checked and unchecked exceptions in JAVA?

1003

---

What carriage return means?

958

---

How do you override a private method in java?

972

---

How big is a 64 bit float?

1024

---

What are decalarations?

1116

---

What is meant by anonymous class?

1017

---

Is there a way to increase the size of an array after its declaration?

1041

---

What is the difference between conversation & casting?

1038

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