Round 1

• DSA: https://leetcode.com/problems/container-with-most-water/description/
• LLD: Design an e-commerce platform order, tracking and delivery system. Handle multiple items with various quantities in a single order, partial and full cancellation support.
• HLD: Given we have an e-commerce platform, how would you handle processing very high amounts of data for analytics and preparing relevant dashboards? Which database you may consider?

Round 2

• Few questions on some tech stack I worked on
• LRU cache implementation

Round 3

• LLD + HLD of a limit system in Kotak. This should limit based on number of transactions, amount per user’s payment method. Handle atomicity, possible bottlenecks etc.

Verdict

Rejected. The panel found few gaps in LLD in #3 :(