GoldMan Sach selection process, Bangalore

They call you via consultancy and ask you to be on time 

First is a written test  having java , sql and aptitude  ,

Java section has 15 question
1.question on  implementation of hash set to remove duplicate employee object
2.question on implementation of array.sort
3. question on A extends B  ,
class A{
int i

A(i){
this.i=i;
}

}
 and in constructor of B(int i) {this(i) }
B(int i , int y){
this(i);
//aaddcode here
}

4. swap(S1,S2) string program  predict output
5. Static method in parent class to  getting over ridden in child class

6. singleton class with projected constructor instread of private constructor

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Some Technical interviews

Then HR round