Cloning

http://www.javabeat.net/tips/34-using-the-prototype-pattern-to-clone-objects.html

hashmap

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package corejava;

import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.TreeSet;
import java.lang.Thread;


/**
*
* @author VijaykumarRamalingam
*/
public class hasmap {
public static void main(String args[])
{
//Hashmap vs Hashtable
//Synschrnized
//null key and null values

HashMap s=new HashMap();
s.put("1","b");
s.put(null, "5");
TreeSet sd=(TreeSet)s.keySet();
Iterator i= sd.iterator();
System.out.print(s.get(null));
Hashtable s3=new Hashtable();
s3.put(1,"b");
s3.put(1, null);
System.out.print(s3.get(1));





}

}

reverse

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package corejava;
public class Main {
public static void main(String[] args) {
int a[]=new int[3];
a[0]=1;
a[1]=2;
a[2]=3;
int j=a.length-1;
for(;j>-1;j--)
{
System.out.println("j"+a[j]);
}
}
}

UBS Interview Questions

1)oops concepts
2)Race condition
3)Deadlock'
4)critical section
5)String
6)Java access specifiers
7)final methods in object class
8)exception hierarchy
9)unchecked exception examples
10)program IO exception
11)f00()-overrriding
12)Collection interface implementation
13)methods of collection classes

Spring/Hibernate interview questions

http://www.mydeveloperconnection.com/html/spring-hibernate-QnA.htm

Hashed Collections

http://www.developer.com/java/other/article.php/10936_3799136_3/Java-Hashed-Collections.htm

Inner classes

http://www.developer.com/java/other/article.php/859381/SJCP-Exam-Preparation-Top-level-and-Inner-Classes.htm

http://www.developer.com/java/ent/article.php/899361/Some-Insight-Into-Inner-Classes-in-Java-Part-1.htm

Transaction Isolation Levels

http://docstore.mik.ua/orelly/java-ent/ebeans/ch08_03.htm