Lots of Duplicate Data and the Data there are different list for that Data. What would you do if You have to find the One element from 2 lists ? List1 = [1,23,35,12,44,86,…….,n] List2 = [22,35,12,55,78,90,…..,n] Most People will use Two For Loop for that like this: for(int i=0; i<list1.size();i++){ …