Amazon Interview Experience by | Off Campus

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SDE - 2

Amazon

3 rounds | 5 Coding problems

Anil Raj

Fresher | Apr 2021

Rejected

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Interview preparation journey

Journey

Getting to MNC was my dream from the very start. I always planned my coding journey in a way that I could finally target those FAANG companies at last. I got to know that a strong hold of DSA is the ultimate key to getting into these companies by my seniors. So, I practiced them regularly from the first year.

Application story

I applied to this post through LinkedIn. I was suffering LinkedIn in search for some opportunities and then I saw these openings and I was very excited for these openings. So, I applied for this post and soon after applying I got mail back from the HR stating about the process ahead.

Why selected/rejected for the role?

I was rejected in the HR Round, and it was really very disappointing for me. I always wanted to be in any of the FAANG companies, and I thought I was just on the edge to get my dream completed that made me nervous, which became the reason for my rejection.

Preparation

Duration: 3 months

Topics: Data Structures - Trie, HashMap, Sets, Priority Queue, Stack, Advanced Topics like Fenwick Tree, Segment Trees, Game Theory, Dynamic Programming, Union Find,Graph Algorithms, Bitmasking

Tip

Tip 1 : Bookmark the GFG Amazon Archives. It helped me a lot during my preparations. Reading other’s interview experiences is one of the best ways to get yourselves ready for the next job interview. Practice daily atleast 5 questions.
Tip 2 : Most commonly asked topics in Amazon Interviews ( as per the mail I received from my recruiter ) :
BFS/DFS/Flood fill, Binary Search, Tree traversals, Hash tables, Linked list, stacks, queues, two pointers/sliding window
Binary heaps, Ad hoc/string manipulations.
Tip 3 : Highly recommended sites for practicing questions ( usually practice medium and hard level questions) :
Leetcode (highly encouraged)
Geeksforgeeks (highly encouraged)
CodeZen( highly encouraged)
Codeforces
Tip 4 : This is a great bigocheatsheet that could be of great help https://www.bigocheatsheet.com/

Application process

Where: Linkedin

Eligibility: NA

Resume tip

Tip 1 : Mention past working experience in detail as how you were important to your previous company.
Tip 2 : Try to keep your resume to 1 page if work experience < 5 years
Tip 3 : Update your resume according to role you are applying for and never put false things on resume.

Interview rounds

Round

Easy

Telephonic

Duration60 minutes

Interview date5 Apr 2021

Problems2

Course Schedule II

You have been given ‘N’ courses and some courses may have prerequisites. Now consider a matrix ‘PREREQUISITES’ of size 'M' x 2 which represents that you must comp...

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System Design

System design a live video broadcast platform.

Round

Medium

Video Call

Duration90 minutes

Interview date6 Apr 2021

Problems2

Distance between two nodes of a Tree

Given a binary tree and the value of two nodes, find the distance between the given two nodes of the Binary Tree.

Distance between two nodes is defined as the...

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Median in a stream

Given that integers are read from a data stream. Your task is to find the median of the elements read so far.

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Round

Medium

Telephonic

Duration60 minutes

Interview date9 Apr 2021

Problems1

Object Oriented Design Question

Started with brief intro about both(5 mins), then he jumped into LP's(25 mins). This was very difficult since there was no video and he was grilling me real hard on this, so many follow ups and in one question, we went on to dicuss at API level.

OOD question, design a parking lot. Expectation was writing clean readable code using OOD principles.