Imagine you are given 10,000 files each containing 1 Million integers. I would you sum all of them and give the final result? ---> Interviewer wanted to test scalability, distributed concepts. He has written the basic code and wanted to improve upon that. Here's the basic code. public getSum(String[] file_names) { int sum = 0; for(String f: file_names) { sum = sum + sumOfFile(f); } return sum; } Questions: What's wrong with above code? Ans: Integer overflow How would you implement sumOfFile? What if 'sumOfFile' takes lot of time to finish computing? How do you fasten the program?
