Amazon Web Services Software Developer Interview Questions and Answers

Round duration - 90 Minutes
Round difficulty - Easy

First round is Online Test (no negative marking). It was held on campus itself in assigned labs. The test is divided into four main sections:

Q1. 
Level Order Traversal Problem Statement
Given a binary tree of integers, return the level order traversal of the binary tree.
Input:
The first line contains an integer 'T', representing the number of te...read more
Ans. 
Return the level order traversal of a binary tree given in level order with null nodes represented by -1.
• Parse the input to create the binary tree using level order traversal

• Use a queue to perform level order traversal of the binary tree

• Print the node values in level order traversal
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Q2. 
Reverse Words in a String: Problem Statement
You are given a string of length N. Your task is to reverse the string word by word. The input may contain multiple spaces between words and may have leading o...read more
Ans. 
Reverse words in a string while handling leading/trailing spaces and multiple spaces between words.
• Split the input string by spaces to get individual words.

• Reverse the order of the words in the resulting array.

• Join the reversed words with a single space to form the final reversed string.
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Round duration - 60 Minutes
Round difficulty - Easy

Technical round:asked general questions about networking, os and troubleshooting.
There were three rounds of interviews, all knockout rounds and were held on the same day. It will be a very long day for you, so I suggest you to be prepared.


This interview is based completely on Networking concepts. They expect you to answer in complete depth and be as detailed as possible. It is very normal for interviewer to keep typing on laptop to record your answers while you speak, so speak only what you are sure about, but do not be intimidated by it. A few questions that were asked:

Round duration - 60 Minutes
Round difficulty - Easy

This round was based on Operating Systems and troubleshooting. Just like Interview 1, they expect you to answer in depth.

Other important topics for AWS Operating Systems and Troubleshooting interview: OS boot process (Win/Linux); Memory management ;Memory pages; Buffer and Caches, Basic commands; System date/time management, network time protocol; Managing Users and groups; File permissions; Managing softwares – installation, uninstallation, upgrade etc; Managing system services and background processes; Remote management of a system – SSH, RDP etc; Network protocols – FTP, HTTP (web servers), SMTP (mail server); System automation – cron, batch jobs, windows startup tasks

Round duration - 45 Minutes
Round difficulty - Easy

Managerial Round- A senior manager from AWS will be taking this interview. It was very conversational and was based mostly on CV. All questions were asked in a completely non technical perspective, but had to be answered pertaining to previous professional tech experiences (be it academic, or internship related), and not in a generalised form.