Amazon Software Development Engineer, interview questions

These are the questions asked : 1. Why did you apply at Amazon? why you want to work for Amazon? 2. What is that do you like about Amazon? 3. what you don't like? 4. If we have 2 files and we have lot of customer ids, file 1 have customer id of day 1 and file 2 would have customer ids of day2, how can we find customers who view the both the files? what 's the complexity of it? 5. Reverse a String 6.We have a Directory, where we have lot of HTMl files, how can we find email address on files and their line numbers they are in? (Grep or find command). 7. You have web application, which runs on a server and your boss comes and up say it's very slow, what do you do? 8. .At the End he told me to write code and email it to him on checkNotation: That is if Input is 1 output should be One If Input is 161 output should be One hundred sixty one