Design a Pub-Sub System

Build the core of an in-memory message broker. Publishers send messages to named topics, and subscribers read them when they are ready, each at its own pace, without publishers and subscribers knowing about each other.

How the round runs

Medium · 5 stages · 5 questions · 60 min

~6 min

Requirements Gathering

lists

~3 min

Identifying Core Entities

cards

~14 min

Designing Classes & Relationships

diagram

~28 min

Code Implementation

code

~9 min

Deep Dives

code

Set up your round

Level

Interviewer

Duration

Junior · Standard · 60 min