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Amazon SDE-2 Interview Questions, Process, and Tips
Top Amazon SDE-2 Interview Questions and Answers
- Q1. Ways To Make Coin Change You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total number of ...read more
- Q2. 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. Median is the middle value in an ordered ...read more
- Q3. Shopping Options You are given the list of costs of pants in an array “pants”, shirts in an array “shirts”, shoes in an array “shoes”, and skirts in an array “skirts”. Yo ...read more
16 Amazon SDE-2 Interview Experiences
59 questions found
Anonymous
1 Interview Round
Interview Questions
- Q1. Find sum of all numbers that are formed from root to leaf path (code) expected time complexity O(n)
View Answers (1)
- Q2. Given a string you need to print all possible strings that can be made by placing spaces (zero or one) in between them. For example : ABC -> A BC, AB C, ABC, A ...read more
View Answers (2)
- Q3. Preorder traversal without using recursion
View Answers (1)
- Q4. There is a 12 km road and a contractor who is in-charge of repairing it. Contractor updates you about the work which is done in patches. Like “Road between 3.2 ...read more
View Answers (2)
- Q5. Several Questions were asked from my project
Add Answer
- Q6. Find median of an unsorted array. (code
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- Q7. General discussion on heaps
Add Answer
- Q8. A stream of characters is coming, at any moment you have to tell ‘k’ elements closest to a given number (code)
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- Q9. Design data structure that supports insert(), remove(), find-max(), delete-max() operations. All operations should run in O(1) time. Lots of discussion was ther...read more
View Answers (2)
- Q10. Check whether given link list represents palindrome
View Answers (1)
Interview Preparation Tips
Experience: Recently I attended Amazon Bangalore interview for SDE 2 position. All f2f and no phone/written screening as I had attended one before and cleared those. Total 4 rounds wer der. The first techh round dey asked mi questions listed above.
Tips: NA
Round: Technical Interview
Experience: ROUND 2 dey asked mi above questions
Tips: NA
Round: Technical Interview
Experience: Round 3 Above questions wer asked.
Round: Technical Interview
Experience: This was the last round. thy asked mi above questions
College Name: NA
Skills evaluated in this interview
2 Interview Rounds
Coding Test Round
Hacker Rank test - 4 rounds (Coding, System Design and Work style assessment, Leadership Principles)
Technical Round (2 Questions)
- Q1. LC - 2 medium difficulty questions Add Answer
- Q2. System design discussion Add Answer
Get interview-ready with top interview questions
I applied via Company Website and was interviewed in Mar 2024.
2 Interview Rounds
Coding Test Round
Amazon Online assessment which consisted of 2 coding DSA medium question
One-on-one Round (3 Questions)
- Q1. Question related to TreeMap Add Answer
- Q2. Question related BFS Add Answer
- Q3. System Design - Design Feed system Add Answer
Interview Preparation Tips
What people are saying about Amazon
3 Interview Rounds
Coding Test Round
Diameter of a binary tree and bfs and dfs questions
Coding Test Round
Data structure and algorithms
Technical Round (1 Question)
- Q1. System design questions Add Answer
Interview Preparation Tips
Amazon interview questions for designations
2 Interview Rounds
Resume Shortlist Round
One-on-one Round (1 Question)
- Q1. Behavioural questions related to leadership principle. Add Answer
Interview Preparation Tips
CodingNinjas
I was interviewed in Apr 2021.
3 Interview Rounds
Video Call Round (1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
Timing: 10AM-11AM
Interviewer was quite supportive and helpful.
Environment was normal as usual and it was morning time
- Q1. Application Question Design a system where user can upload, delete and share the video/image files. And can immediately view the uploaded files on the dif...read more Add Answer
Video Call Round (2 Questions)
Round duration - 60 Minutes
Round difficulty - Medium
Timing: 11AM-12PM
The interviewer was SDE2
He was checking the code for edge cases and was hinting if required
- Q1. Implement a priority queue Ninja is given a task to implement a priority queue using Heap data structure. The Ninja is busying preparing for the tournament., So...read more View Answers (1)
- Q2. Ninja and the bulbs Ninja owns an electronic shop. In the shop, Ninja has 'N' bulbs. To sell these bulbs, Ninja has to check if they are of good quality...read more View Answers (3)
Video Call Round (1 Question)
Round duration - 60 Minutes
Round difficulty - Medium
Timing: 6PM-7PM
The interviewer was not interactive and didn't gave any feedback whatsoever.
It was Hiring Manager Round
Interviewer was Software Development Manager at Amazon
- Q1. Maximize the sum You are given two sorted arrays of distinct integers, ‘ARR1’ and ‘ARR2’. If you find a common element in both arrays, you can switch from one a...read more View Answers (3)
Interview Preparation Tips
Tip 1 : Focus on internals of Data structure on how it actually works
Tip 2 : Implement the Data Structure from scratch, later you can use the inbuilt packages no problem but you must know the implementation
Tip 3 : Understand System Design concepts
Tip 1 : Highlight your contributions you made and how it impacted the business and be real
Tip 2 : Mention the improvement figures like x% reduction in page load size, improved SEO ranking by x figure, reduce memory usage by y%
Skills evaluated in this interview
I was interviewed in Apr 2021.
3 Interview Rounds
Telephonic Call Round (2 Questions)
Round duration - 60 minutes
Round difficulty - Easy
Started with brief intro(5 mins) about interviewer.
Problem solving question, question was already there in the codelink shared by the interviewer. He explained the problem again with sample testcase.
The Interviewer was friendly.
- Q1. 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 ...read more View Answers (2)
- Q2. System Design
System design a live video broadcast platform.
Add Answer
Video Call Round (2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
There were 2 interviewers(India HM and Seattle HM), India HM was just shadowing and didn't ask any questions. Started with intro, he asked in detail about what I do at current company(10 mins). Again, jumped into LP's(25 mins).
- Q1. 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 ...read more View Answers (2)
- Q2. 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. Median is the middle value in a...read more View Answers (3)
Telephonic Call Round (1 Question)
Round duration - 60 minutes
Round difficulty - Medium
There was only 1 interviewer in this round and We had no video sharing in this round so it was becoming difficult to understand each other.
- Q1. 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...read more Add Answer
Interview Preparation Tips
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/
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.
Skills evaluated in this interview
I was interviewed in Mar 2021.
3 Interview Rounds
Coding Test Round (2 Questions)
Round duration - 45 minutes
Round difficulty - Medium
This round was scheduled in the evening hours and all the participants were required to fill a form which was shared 15 minutes prior to the start of the online coding round. This form was filled out probably for the security reasons and to ensure that no one disinterested participant gives the test.
- Q1. Ways To Make Coin Change You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total ...read more View Answers (4)
- Q2. Validate BST You have been given a binary tree of integers with N number of nodes. Your task is to check if that input tree is a BST (Binary Search Tree) or not...read more View Answers (2)
Telephonic Call Round (1 Question)
Round duration - 60 minutes
Round difficulty - Hard
This round was on call where I was just supposed to answer the tech questions that were asked. It started with a brief interview with one another and then moved to questions on DBMS, operating systems, computer networks and all. Almost 20-25 questions were asked and I probably answered 90% of them correctly.
- Q1. Reverse Linked List You are given a Singly Linked List of integers. You need to reverse the Linked List by changing the links between nodes. Input Format : The ...read more View Answers (2)
HR Round (1 Question)
Round duration - 30 minutes
Round difficulty - Hard
There was only one interviewer for this round. He continuously interacted with me and was giving me some good situational problems that were not very easy to answer. Basically those were open-minded questions which can be answered oth ways and that's why I found it quiet hard as per my nature but at the end things went well for me.
- Q1. Basic Puzzles A noticeable aspect in this puzzles is the fact that there’s a circular misplacement, which implies if apple is wrongly labelled as Apple, Apple c...read more View Answers (1)
Interview Preparation Tips
Tip 1 : practice on gfg and coding ninjas
Tip 2 : compete on codechef and codeforces
Tip 3 : learn DSA and practice regularly
Tip 1 : put your entire valuable experience in brief
Tip 2 : put the handle of you competitive coding profiles
Tip 3 : try to put those things that really attracts the recruiter, will be better if your past experiences relates to the company
Skills evaluated in this interview
Rachit Jain
I was interviewed in Oct 2020.
4 Interview Rounds
Coding Test Round (2 Questions)
Round duration - 90 minutes
Round difficulty - Easy
I got a call from an Amazon recruiter regarding the schedule of the test . She sent me the coding test link which I had to complete within a week. we can attempt the online test anytime, when we have time for a period of 90 minutes at a stretch.Once I completed the test, I got a call to schedule the interviews in two weeks.
- Q1. Shopping Options You are given the list of costs of pants in an array “pants”, shirts in an array “shirts”, shoes in an array “shoes”, and skirts in an array “s...read more View Answers (2)
- Q2. Max Submatrix Ninja has been given a matrix ‘MAT’ of integers having size ‘N’ x ‘M’ i.e. N rows and M columns. Ninja has to find the maximum sum submatrix in it...read more View Answers (2)
Video Call Round (2 Questions)
Round duration - 60 minutes
Round difficulty - Medium
Virtual interview occured in amazon chime.The interviewer gave his introduction, asked me a bit on the kind of projects I’ve worked on. Then he started with a data structure problem.
- Q1. Clone a binary tree with random pointers. You are given a binary tree. Apart from the left and right child pointers, each node in the given binary tree points t...read more View Answers (2)
- Q2. Ninja Port Ninja is stuck in a city with ‘N’ colonies, and each colony contains ‘K’ houses. Ninja is currently at the house number “sourceHouse” present in the ...read more View Answers (1)
Video Call Round (1 Question)
Round duration - 75 Minutes
Round difficulty - Easy
This was taken by an engineering manager who asked me regarding my projects for around 10-15 mins and then we moved to a system design problem. He asked me to design Slack messenger.
I started by listing the functional and non-functional requirements(on which he questioned me a bit), then I moved to draw the high-level architecture. The components which I drew were the clients, gateway service(LB + authentication, etc), Messaging Service, User Service, Web Socket Manager service, Fan Out service(I added this for the group messages thing, but he didn’t interrogate much on that).
He asked me what would be the schema of my messages table and the scenarios in which the recipient user is online/offline.Also asked about the partitioning key and primary key of the 2-3 tables which I had made
- Q1. Technical Questions This was taken by an SDE III guy, who again asked me about my projects for like 10 mins and then moved on to a low level design question.He ...read more Add Answer
Video Call Round (2 Questions)
Round duration - 60 minutes
Round difficulty - Hard
BarRaiser Round
This was again taken by an engineering manager who discussed my projects in depth for around 20-25 mins. In the remaining time he asked me 2 dsa questions. (Yes I too was surprised that he didn’t ask anything regarding design).
In almost all the rounds, I was asked questions related to Amazon Leadership principles, so do make sure you go through those before sitting for the interview process. You can refer to this link(https://www.codingninjas.com/codestudio/problem-lists/top-amazon-coding-interview-questions) for practicing the same, I found it useful.
In the design rounds, interviewer doesn’t expect the most ideal answer from you and unless your choice of technology is outrageously wrong, he won’t pinpoint that.
- Q1. Group Anagrams Together You have been given an array/list of strings 'STR_LIST'. You are supposed to return the strings as groups of anagrams such that ...read more View Answers (3)
- Q2. Add Linked Lists Given two numbers represented by linked lists. Your task is find the sum list and return the head of the sum list. The sum list is a linked lis...read more View Answers (2)
Interview Preparation Tips
Tip 1 : Expect questions related to Amazon Leadership principles in all rounds, so go through those thoroughly before sitting for the interview process.
Tip 2 : In the design rounds, interviewer doesn’t expect the most ideal answer from you and unless your choice of technology is outrageously wrong, he won’t pinpoint that.
Tip 3 : Data Structures questions are a must in all rounds, so try to master them thoroughly
Tip 1 : Make sure you know everything you mention in your resume
Tip 2 : Have some hands on with hackathons and contests ,which brings an added value to your resume
Skills evaluated in this interview
I was interviewed before Sep 2020.
5 Interview Rounds
Coding Test Round (2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
- Q1. Number of Islands You are given a 2-dimensional array/list having N rows and M columns, which is filled with ones(1) and zeroes(0). 1 signifies land, and 0 sign...read more View Answers (2)
- Q2. Add First and Second Half You are given a Singly Linked List of N nodes such that each node represents a single digit. Your task is to return a node 'X'...read more View Answers (2)
Video Call Round (1 Question)
Round duration - 60 minutes
Round difficulty - Medium
- Q1. Next greater element You are given an array arr of length N. You have to return a list of integers containing the NGE(next greater element) of each element of t...read more View Answers (3)
Video Call Round (2 Questions)
Round duration - 60 Minutes
Round difficulty - Hard
- Q1. Word Break You are given a non-empty string containing no spaces (say sentence) and a dictionary of list of non-empty strings (say the list of words). You are s...read more View Answers (4)
- Q2. Valid Parenthesis You're given string ‘STR’ consisting solely of “{“, “}”, “(“, “)”, “[“ and “]” . Determine whether the parentheses are balanced. Input For...read more View Answers (2)
Video Call Round (1 Question)
Round duration - 60 minutes
Round difficulty - Easy
- Q1. System Design
Design a local transport system like BMTC.
Add Answer
Video Call Round (1 Question)
Round duration - 60 minutes
Round difficulty - Easy
- Q1. Project Questions It was mix of HLD, LLD design discussion of your project. Make sure you know enough about your projects. Questions asked were based on Amazon ...read more View Answers (1)
Interview Preparation Tips
Tip 1 : Practice a lot.
Tip 2 : Focus on system design
Tip 3 : Focus on amazon Leadership principles.
Tip 1: Mention relevant details for job you are applying.
Tip 2: Be objective and concise.
Skills evaluated in this interview
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