Microsoft SDE Intern Interview Experience
💼 LTIMindtree Interview Experience (On-Campus) | Fresher | 2026
Salesforce SMTS | Interview Experience | Rejected
JPMC | SDE2 (Associate) - Java Backend - Interview Experience + Compensation
Microsoft - SDE2 - Coding Round
Amazon HLD LLD DSA Questions
Summary
The author, while preparing for an Amazon SDE 2 role, compiled a detailed list of frequently asked HLD, LLD, and DSA questions based on LeetCode discussions and personal interview encounters to give back to the community.
Full Experience
Hello, Just giving things back to the community. I was preparing for Amazon SDE 2 interview from past 4 months. Although things didn't go in my way, 2-3 months ago during my preparation I listed (took from leetcode discuss) what kind of questions they were asking. You can go through the questions below, it will give you a rough idea. Don't get worried about HLD and LLD questions you see here. First be prepared with standard questions what most top tech companies ask.
HLD
- Design a chat system (3 times)
- Design a collaborative code editor like Google Docs
- Design a ride-sharing app like Uber (2 times)
- Question related to metrics and distributed tracing (vague)
- High-Level Design of BookMyShow (focus on booking, high traffic handling)
- Design Google Docs with scalable link sharing (hot hits handling)
- Design a URL shortener
- Design Google Drive
- Design Twitter with some custom requirements
- High-Level Design of a Payment Service (focus on scalability, fault tolerance, trade-offs)
- Design a chat app with video messaging and video replies
- Design TikTok
- Design autocomplete / search recommendations in Amazon Search (given a ranking algorithm)
- Design a vehicle service center management system
- Design a news feed like Reddit (with age restriction capability)
- Design an upload service like Google Drive (files + photos)
- Design a system to extract images from video frames and show purchase links for products on Amazon Prime
- Design a system to track and reward Twitch viewers by watch time (top 10 viewers in the past week)
- Design a delivery workflow system where the delivery person scans products, updates states, triggers emails, and uses OTP/pictures for delivery confirmation
- Design a vehicle tracking system for multiple client use cases (cab booking, food delivery)
- Design a metrics monitoring and alerting system
- Update Mars Rover [https://leetcode.com/discuss/post/5804312/amazon-hld-update-mars-rover-by-nsd14022-svdz/]
- Design a tag management system
- Desing URL shorterner (This was asked to me)
LLD
- Design the LLD of a Vending Machine
- LLD – Design a Quick Commerce System
- Design a Parking Lot
- Design Amazon Locker
- LLD of Splitwise
- Design a Hotel Reservation System
- Design Customer Reviews for products in Amazon
- Rate Limiter LLD
- Design a Movie Booking System
- Design an IRCTC Booking System (Railway Reservation) – focus on booking module and conditions
- Design a Rate Limiter (2 times) – explained Token Bucket Algorithm, follow-up: 10 threads & 1000 API calls
- LLD for a Seller Experience Application
- Design a File Storing System somewhat similar to https://leetcode.com/discuss/post/1071562/design-a-file-download-application-syste-7kg2/
- Design a Chat Messenger like WhatsApp or Facebook Messenger
- Design a Delivery Partner Assignment System
- Design a Chess Game
- Design a File Download System
- Design an LRU Cache
- Design an Elevator (This was asked to my fellow candidate in F2F interview)
DSA
So few interview experiences provide direct leetcode problems link. This is my list which has 27 problems https://leetcode.com/problem-list/23kp61xm/ and below are open questions which I found
-
Koko Eating Bananas
-
Monotonic Stack problems
-
Word Break (asked twice)
-
Amount of Time for Binary Tree to be Infected – N-ary Tree variation
-
Longest Common Subsequence
-
Longest Palindromic Substring
-
Zigzag Level Order Traversal of Binary Tree
-
Max Path Sum in Binary Tree (with negative values)
- Follow-up: Print the path as well
-
Kth Smallest Element in BST
-
Missing Ranges (Leetcode)
-
Matrix Clockwise Rotation – Bar Raiser style
-
Path Sum I: Given a binary tree and target value, check if there's a path from root to leaf whose node sum equals target
-
Path Sum III variation: From any node to leaf, path only moves up (doesn't cross root) – tricky constraint
-
Shortest Path in Grid (4 directions only, no diagonals) – variation of “Shortest Path to Find Food”
-
Amazon Locker Problem:
- Function to return locker to open when package is received
- Function to retrieve package for a customer
-
Maximum Subset Sum in Binary Tree such that no two nodes are adjacent
- Follow-up: Print the subset
-
Minimum Number of Platforms – classic interval scheduling logic
-
Top View of Binary Tree
-
Dynamic Number of Islands – with each query (DSU/DFS)
-
Next Permutation
-
Decode Encoded String – e.g.
a3[b2[c]]→abccbccbcc -
Longest Valid Parentheses
-
Dungeon Game type problem
-
Lottery System – Closest match: Random Pick With Weight on LeetCode
Interview Questions (64)
Design a chat system
Design a collaborative code editor like Google Docs
Design a ride-sharing app like Uber
High-Level Design of BookMyShow (focus on booking, high traffic handling)
Design Google Docs with scalable link sharing (hot hits handling)
Design a URL shortener
Design Google Drive
Design Twitter with some custom requirements
High-Level Design of a Payment Service (focus on scalability, fault tolerance, trade-offs)
Design a chat app with video messaging and video replies
Design TikTok
Design autocomplete / search recommendations in Amazon Search (given a ranking algorithm)
Design a vehicle service center management system
Design a news feed like Reddit (with age restriction capability)
Design an upload service like Google Drive (files + photos)
Design a system to extract images from video frames and show purchase links for products on Amazon Prime
Design a system to track and reward Twitch viewers by watch time (top 10 viewers in the past week)
Design a delivery workflow system where the delivery person scans products, updates states, triggers emails, and uses OTP/pictures for delivery confirmation
Design a vehicle tracking system for multiple client use cases (cab booking, food delivery)
Design a metrics monitoring and alerting system
Design a tag management system
Desing URL shorterner (This was asked to me)
Design the LLD of a Vending Machine
LLD – Design a Quick Commerce System
Design a Parking Lot
Design Amazon Locker
LLD of Splitwise
Design a Hotel Reservation System
Design Customer Reviews for products in Amazon
Rate Limiter LLD
Design a Movie Booking System
Design an IRCTC Booking System (Railway Reservation) – focus on booking module and conditions
Design a Rate Limiter (2 times) – explained Token Bucket Algorithm, follow-up: 10 threads & 1000 API calls
LLD for a Seller Experience Application
Design a File Storing System somewhat similar to https://leetcode.com/discuss/post/1071562/design-a-file-download-application-syste-7kg2/
Design a Chat Messenger like WhatsApp or Facebook Messenger
Design a Delivery Partner Assignment System
Design a Chess Game
Design a File Download System
Design an LRU Cache
Design an Elevator (This was asked to my fellow candidate in F2F interview)
Koko Eating Bananas
Word Break (asked twice)
Longest Common Subsequence
Longest Palindromic Substring
Zigzag Level Order Traversal of Binary Tree
Max Path Sum in Binary Tree (with negative values)
- Follow-up: Print the path as well
Kth Smallest Element in BST
Missing Ranges (Leetcode)
Matrix Clockwise Rotation – Bar Raiser style
Path Sum I: Given a binary tree and target value, check if there's a path from root to leaf whose node sum equals target
Path Sum III variation: From any node to leaf, path only moves up (doesn't cross root) – tricky constraint
Shortest Path in Grid (4 directions only, no diagonals) – variation of “Shortest Path to Find Food”
Amazon Locker Problem:
* Function to return locker to open when package is received
* Function to retrieve package for a customer
Maximum Subset Sum in Binary Tree such that no two nodes are adjacent
* Follow-up: *Print the subset*
Minimum Number of Platforms – classic interval scheduling logic
Top View of Binary Tree
Dynamic Number of Islands – with each query (DSU/DFS)
Next Permutation
Decode Encoded String – e.g. a3[b2[c]] → abccbccbcc
Longest Valid Parentheses
Lottery System – Closest match: Random Pick With Weight on LeetCode
Preparation Tips
What I will suggest you is to maintain your own tracker and list recently asked questions at the time of your prepartion. First be prepared with standard questions what most top tech companies ask. I created a list in leetcode and added them to it, which will be very easy for us to practice: https://leetcode.com/problem-list/23kp61xm/. I suggest you to do the same thing. If it is not a leetcode problem or a open question statement track it somewhere, I do it in google docs.