JAVA interview questions – page 3

Explain RMI

I m sending my data frm one page. The second page process it & saves to database and display message like DATA SAVED on same page(second). If I refresh the browser the same query re-execute & again same data store. How Can I check this(I meanwithout using

Like Object class is inherited by every class, means every class that you define in java is implicitely extending one class that is Object. Similarly i want to know that which interface is implicitely implemented by every class that we define. let me know

Let say there are two interfaces like the followinginterface int1{int meth1();}interface int22{int meth1();}ok theni am implementing both of them in a calss as followsclass mycl implements int1,int2{}now as the rule says, if a class implements an interfac

What is the purpose of using Java Beans? when should we extend JavaBean class? Please send the result of shuffles(1002,101) along with your program

Talk about collection framework of Java.

Given a list of methods in java, some are unsafe. U r provided wit a method isUnverifiable tat takes a method and returns true or false based on whether the method passed is safe or unsafe. Write a code the takes in an array of method and ou...

What is difference between java.lang .Class and java.lang.ClassLoader? What is the hierarchy of ClassLoader

What is difference between runnable and thread ?why we use static class

What are the types of polymorphism in java?

Threading : - How can you pass data between two threads?

How Java manages without multiple inheritance?

Difference b/w forward and sendRedirect

How to check for memoery leaks?

I need your help to answer the code shown below.using System;using System.Collections.Generic;using System.Text;using System.Collections;namespace ApplicantTestin{/// The DataObject class stored with a keyclass DataObject{// Populate}class Program{static

What is the lifecylcle of servlet?

I have been doing the java project using JBuilder 2.0 as front end and oracle 8i as back-end .I can't connect to oracle using JBuilder 2.0 please say detailed code for that coding. whether i have to import extra other than import java.sql.*;

If we are having Interface A,Interface B,Interface C and Class D where A,B,C are Base classes and D has extended the features of all the threeif A,B,C are having totally 5 methods and D has developed only 3 of them what will happen when we compile that pr

Is there is another way to serialize data other than serialization.

What is root class of all java classes

Why java is platform independent? (They expected something other than bytecode and portability)

What is the widely used web programming technology? what is the advantages of JSP among other technologies?

What is UML patterns?give me clear explanation

How can we emplement strutsframework using jsp or servlets.Tellme.

Class hierarchy of AbstractMap is as follows"AbstractMap implements Map"Class hierarchy of HashMap is as follows"HashMap extends AbstractMap implements Map"When AbstractMap implements Map interface and AbstractMap is extended by HashMap, what is the use o

What is purpose of applet programming?

How can I protect my database password ? I'm writing a client-side java application that will access a database over the internet. I have concerns about the security of the database passwords. The client will have access in one way or another to the c

Can I execute or call one applet from another applet? If so then how? Please Reply me...Thanks

Difference b/w Abstract class and Interface

What is Ant tool and use of this tool? How to configure this tool with servlet by using eclipse3.1? What is plug-in and use of the plug-in? and also how to configure with struts application by using Eclipse 3.1 Ide.