any one tell the answer

speicfying access modifier, return type, method name, 
arguments are called method signature
eg: 

public void add(int a,int b)---method signature of the 
method

public void add(int a,int b)
{
return (a+b);
}

correct me if i am wrong.

speicfying access modifier, method name, 
arguments are called method signature only 
if the return type differnent then also both are called as 
same signatured if am not mistaken

Yes priya, you are right

Return type is not a part of the method signature.

It means no. of arguments, type of argument ,order of data 
type.