Perform best in every round and don't make any hope as you will never come to know why you got rejected even after last round. Got call for Amazon support engineer for some Instant video team. Process started with written round where objective and subjective both types of questions were asked. Objective question were from tree, data structure, 2-3 aptitude questions, scripting, and some programming result problems. Subjective questions were from scripting, linked list, and merging arrays. Many scripting problems were there like find some given pattern mobile no.s from a directory where no.s are written inside html files and store those no. in another file. They were not expecting the correct answer or syntax but approach and logic. Scripting problem were their main concern. You can answer in any language. Here is the list of questions that i was asked in each interview round - R1 1. Print all the pairs in the given array whose sum is present in the array. (with minimal complexity) R2 1. Print the error codes and their frequencies in descending order from the log files that is created every hour end within a new directory with hour name inside a parent directory. The log file content is like – SUCCESS=(some information) ERRORCODE=400=(some information) ERRORCODE=300=(some information) ERRORCODE=201=(some information) ------------------------------------ ----------------------------------- ------------------------------------- 2. How to troubleshoot if you find that a webpage of a user account and shows the all the videos perched by him is not showing the list on the webpage or he is not able to download the videos from there. Explain the possible causes and troubleshooting steps. R3 1. Swap variable without using new variable 2. Find and replace substring from a string 3. RDBMS and CODD’s rule 4. Delete and truncate command difference 5. Create and update table information with s ome conditions 6. Join two tables 7. Troubleshooting steps to solve webserver problem 8. Basic Unix commands and problem on replacing a string from all the files in a directory then how to undo the operation. After the 3rd round they fix my final round as telephonic on a date but when I didn't get the call on scheduled date I called back then they told because manager was not available so they will schedule it to next day. After 2 days I got reject mail .. no idea why ...