Given a file, find the ten most frequently occurring words as efficiently as possible

Question

This is apparently an interview question (found it in a collection of interview questions), but even if it\'s not it\'s pretty cool.

We are told to do this efficien

Answer 1

I have done in C# like this(a sample)

int wordFrequency = 10;
string words = "hello how r u u u u  u  u u  u  u u u  u u u u  u u u ? hello there u u u u ! great to c u there. hello .hello hello hello hello hello .hello hello hello hello hello hello ";            

var result = (from word in words.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries)
                          group word by word into g
                          select new { Word = g.Key, Occurance = g.Count() }).ToList().FindAll(i => i.Occurance >= wordFrequency);