CoinSwitch-SDE2

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coinswitch
SDE II3 years
April 3, 20256 reads

Summary

I interviewed for an SDE2 role at CoinSwitch, undergoing three rounds covering Data Structures & Algorithms, Low-Level Design, and High-Level Design. Despite a comprehensive interview, I was rejected due to lack of prior experience with their tech stack.

Full Experience

Education : Tier2 + Tier1
Work Ex : SDE2 at Indian E-commerce company(~3 yoe)

3 Rounds
Round1 : 2 DSA Questions
1. House Robber.
2. LCA.

Round2 : LLD
1. Had indepth discussion on current work for around 30mins.
2. LLD of a food delivery app.

Round3 : HLD + HM
1. Usual HM questions and stuff.
2. HLD of customer care chat section of any app, question related to product features , scalability etc etc.

Verdict : Rejected because of no prior experience with the tech stack.

Interview Questions (4)

Q1
House Robber
Data Structures & Algorithms

A dynamic programming problem where the goal is to maximize the amount of money robbed from a row of houses, with the constraint that adjacent houses cannot be robbed.

Q2
Lowest Common Ancestor (LCA)
Data Structures & Algorithms

Find the lowest common ancestor of two given nodes in a tree or a directed acyclic graph.

Q3
Low-Level Design (LLD) of a Food Delivery App
System Design

Design the low-level components and interactions for a food delivery application.

Q4
High-Level Design (HLD) of Customer Care Chat
System Design

Design the high-level architecture for a customer care chat section within any application, including discussions on product features and scalability.

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