Databricks System Design Interview Questions

These are the 17 Databricks system design interview questions AceOffer has reconstructed from candidate reports, sorted by how often each was reported. Bookstore / Book Seller Platform System Design leads at 22×. Every question shows when it was last reported; the catalog refreshes monthly.

Key facts

•17 distinct system design questions indexed
•76 candidate reports across those questions
•Most reported: Bookstore / Book Seller Platform System Design — 22× (last seen August 2026)
•Refreshed monthly · last updated September 2026

Which Databricks rounds ask system design questions?

The Databricks rounds below are where these questions come up. Counts are distinct questions, not times asked.

One round, with pseudocode expected for the concurrency parts: the bookstore broker with async fan-out, an in-memory KV cache with a write-ahead log, Slack-style messaging, and a strongly consistent file system.17 questions

Most reported: Bookstore / Book Seller Platform System Design — 22×

Which Databricks system design questions get asked most?

Sorted by candidate-report frequency. Click any question for the full breakdown.

Question	Round	Reported	Last seen
Bookstore / Book Seller Platform System Design Design an online book seller platform where you act as a middleman/broker. Customers submit a book (by ISBN), a bid price, and…	System Design	22×	August 2026
Design Slack / Chat / Messaging Platform Design a Slack-like chat/messaging platform. The system should support: 1. One-to-one and group messaging (channels/threads) 2. Users subscribing to multiple channels; messages…	System Design	15×	July 2026
File System Design Design a distributed file system (similar to GCS, NOT S3/Cassandra-style last-writer-wins). The system must support the following operations with strong consistency guarantees:…	System Design	8×	April 2026
In-Memory KV Cache with WAL Log Design an in-memory key-value (KV) cache/store for a web service. The core requirements are: 1. Basic interface: put(key, value) and get(key) operations…	System Design	6×	July 2026
Distributed File System Design Design a distributed file system. The system has the following properties and requirements: 1. Files are immutable once written (no in-place updates).…	System Design	4×	May 2026
Music / Song Playlist System Design Design a music/song playlist system (sometimes framed as a shared/collaborative playlist app). The system must support three core operations: (1) addSong /…	System Design	4×	July 2026
Visa / Payment Network System Design Design the architecture for a Visa-scale payment network / payment gateway system. Key requirements and scope vary slightly by interviewer but generally…	System Design	3×	January 2026
Stock Trading System Design Design a stock trading system where users can submit a desired trade price along with a timeout duration. The trade must complete…	System Design	3×	April 2026
Job Scheduler with Task Dependencies Design a job scheduler system. In the low-level variant: each job is a task list containing dependency relationships between tasks — candidates…	System Design	2×	April 2026
Game Shop / Transaction System Design Design a game shop transaction system. The system should support the following core operations: 1. Add credit to a user's account (recharge/top-up).…	System Design	2×	November 2025
Ad System with Daily Budget Management and Click Tracking Design an ad serving system with the following requirements: 1. Ad Query: Websites send queries to the system and receive ad IDs…	System Design	1×	October 2025
Network Throttling / Rate Limiting System Design Design a network traffic throttling system for a cloud/datacenter environment. The system must handle two distinct traffic directions: 1. Outgoing (egress) traffic:…	System Design	1×	March 2025
Waymo-like Autonomous Rideshare App Design Design a user-facing mobile/web application for an autonomous vehicle (AV) ridesharing service similar to Waymo. The focus is on the user-interaction layer.…	System Design	1×	October 2025
Design Google Drive / Dropbox Design a cloud storage platform similar to Google Drive or Dropbox. The system should support file upload, download, synchronization across devices, sharing,…	System Design	1×	February 2026
Design Amazon (E-commerce Platform) Design a large-scale system for Amazon (specific target system not disclosed in reports — likely an Amazon-internal or e-commerce service). The interview…	System Design	1×	November 2025
CRUD Schema + REST API + Async Provisioning Job Queue Design a system with three parts: 1. Relational Database Schema: Model customer–user–repo relationships with the following constraints: - A customer can have…	System Design	1×	January 2026
RAG Design for Data Retrieval in Coding Agent Design a retrieval system for an internal coding agent that helps users answer data-related questions. Specifically, when a user asks a data-related…	System Design	1×	April 2026

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FAQ

How many system design questions does Databricks ask?▾

AceOffer has reconstructed 17 distinct Databricks system design interview questions from 76 verified candidate reports, each with verbatim follow-ups and a last-reported date.

What is the most common Databricks system design interview question?▾

Bookstore / Book Seller Platform System Design — reported 22 times, last seen August 2026.

How fresh is AceOffer's Databricks system design question data?▾

The catalog is refreshed monthly from new candidate reports, and every question shows when it was last reported.

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Every question, every candidate-reported follow-up, and what passers actually do. Monthly refresh.

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