Education : B.E(Electronics and Telecommunication)
Status: 18 months of Exp
Previous Company: Accenture
Position: Cloud Support Associate at Amazon
Location: Bangalore/ Hyderabad, India
Date: 27th Feb 2021
The interview process comprised of 5 rounds with each round being an elimination round:
1st Round (Online Exam):
Online mettl test: 4 sections:
- General Aptitude + English (15ques- 20min)
- Technical Aptitude 1 (on Computer Networks, DBMS, OS, digital communication: 25quess)
- Technical Aptitude 2 (15-20ques: ex: O/P of javascript code, etc)
- Two coding questions
F2F/Videocall Interview:
2nd Round(Technical): Operating Systems,Programming, Troubleshooting scenarios(45 min)
3rd Round(Technical): Networking,Troubleshooting (1 hour)
4th Round(Behavioural)(Managerial Round): Based on Amazon Leadership Principle
5th Round(Behavioural- Managerial Round):Basic Life Situation Questions and Leadership Principle
Interview Questions
Round 1: Coding questions: (Medium)
Q1: Based on Dynamic Programming
Q2: Basic Tree Question.
Round 2: Technical Interview 1 (Programming, Operating Sysytem):
Part 1:OS
Virtual Memory
how I'm able to run a 7GB game with my 4 GB RAM? Why the game gets slow in such cases
which OS I primarily work on and why?
OS Boot process
Difference between buffer and cache
explain chmod command
remotely managing a system
if I have to run a management script in my system at a particular time each day, how will I proceed? What exactly goes inside cron jobs scripts
Difference between processes and threads, pages and fragments
Part 2: Troubleshooting
If I'm unable to copy a file from my system and paste it, what can be the possible reasons and how will I troubleshoot
(is it memory scarcity, storage scarcity or are there any other reasons as well?)
P.S.: Some more interesting questions were also there that I do not remember
The USB port is working in you PC but not working in Customer PC's
Why is your PC slow Torubleshoot and find appropriate solution
Part 3: Programming
As Time was Running out Basic Question was asked:
- given a Dynamic Array Sort the Array
Round 3: Technical Interview (Networking and Troubleshooting): (1 hour)
What exactly are the requirements to make two computers communicate (they are close to each other, connected to same network) (here, also highlight the fact that how one computer will uniquely identify the other computer)
Different layers of the OSI model, protocols involved at each layer and name of data units at each layer.
Hardware devices involved in network, DLL and physical layer
Why the TCP/IP model used over OSI model
MSS and MTU
command to track and print the path traversed between different routers
Components of TCP header (Flags, window size, etc.)
Broadcast domain
ARP (indirect question based on it) and ICMP
How DHCP server is uniquely identified by the client , DHCP DORA process (and why each step of DORA process, such as request and acknowledgment are important)
router functions
Port number of HTTP, https, FTP, DHCP
How TCP/ IP connection is established (via 3-way handshake) and terminated
Different flag codes in TCP header
How remote connection is established through SSH
Subnetting? Numerical based on subnetting where I had to create 5 subnets and 32 hosts.
Concept of public and private IPs? Can two systems connected to same network have the same public IPs? How conflict is resolved in that case?
NAT? Mapping of public and private IPs, MAC address
Flow control and error control related questions
Difference between TCP/ UDP
When amazon.com is searched for, how the entire process works
Will I able to access amazon.com if I'm using private IP (say, if I'm a part of an organization). Or will I need a public IP as well to connect with it?
Concept of Proxy and firewall? Stateless and stateful firewalls?
If one person is able to access amazon.com website, while the other person is not, what can be the possible valid reasons for the 2nd person, provided the amazon.com website is working fine. Why clearing cookies also helps in reaching to a website?
Subnetting- Given a subnet mask. find the number of IP address available.
APIPA
NAT,ARQ
How does Traceroute works and complete flow
Round 4 and 5 : Managerial Round ( 45-1hour)(Based on Amazon's Leadership Principle ):
Q1: Ever faced any situation when I completed the work just before the deadline. How I was able to cop-up with pressure and manage everything in time in the last moment.
Q2: Did I got a negative feedback/ comments, not in my favor from any of my seniors/ project mentors/ colleagues? If yes, can I share what was it and how you dealt with it? Or any steps/ measures I took in order to fix it.
Q3: Ever worked in a team when team members were tough going, or you faced difficulty in collaborating with them? How I was able to deal with such kind of situations if any, and how I was able to get things done?
The interviewer was very friendly and was ready to give some hints/ make you feel comfortable if you were stuck somewhere, although its always better if you drive the conversation on your own and are confident about your answer.