Airbnb Interview Questions
Practice the exact questions companies are asking right now.
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Compute board-game score from regions
You are given a 2D board for a board game. Each cell is encoded like G1 or W0: - The first character is the terrain/area type (e.g., G, W, S). - The d...
Find valid split-stay listing combinations
You are building a feature that suggests a split stay: a guest stays in one home for the first part of a trip, then switches to a second home for the ...
Find smallest permutation under constraints
Given a non-negative integer n, consider its decimal digits as a multiset (digits can repeat). 1) Return the smallest possible integer that can be for...
Construct smallest number from I/D pattern
Problem You are given a string pattern consisting only of the characters: - 'I' meaning the next digit is increasing - 'D' meaning the next digit is d...
Simulate pouring water onto terrain
Problem You are given an integer array heights representing a 1D terrain (each index is a column height), an integer V (units of water), and an index ...
Design a real-time chat system with hot groups
Design a real-time chat system (similar to an in-app messaging feature) that supports: - 1:1 and group conversations - Real-time delivery over WebSock...
Design a Rental Marketplace Backend
Design the backend for a large vacation-rental marketplace similar to Airbnb. The system should support: - A home page that shows popular destinations...
Design a booking system
Design an online booking system (e.g., for hotel rooms, meeting rooms, or appointment slots). Requirements Cover the following in your design: - Core ...
Design an A/B test with causal inference
A/B Test Design: Checkout Nudge (Guest-Level Randomization) Setup - Run dates: 2025-08-04 to 2025-08-31 (28 days). Analyze the primary metric on a mat...
Design a banking ledger for deposits/withdrawals
Banking/OO Design: Account Ledger Design a minimal in-memory or persistent component for a bank account system that supports: - deposit(account_id, am...
Find best downhill ski run from a start
You are given an R x C grid of integers representing elevations. A skier starts at a given cell (sr, sc). From a cell, the skier may move up/down/left...
Design a fast host listing metrics page
Design the backend for a host (landlord) listings page. User flow: - Host opens a page showing many of their listings. - Host selects a date range. - ...
Design a group chat system
System Design: Group Chat Design a scalable group chat system (like a basic Slack/WhatsApp group chat). Core features - Users can create groups, join/...
Compute maze score using shortest path
You are given a grid-based maze game. - The maze is an R x C grid of characters: - '#' = wall (cannot pass) - '.' = empty cell - 'S' = current p...
Find hotel pairs to cover a split stay
You are implementing a simplified “split stay” feature. Problem You are given: - n hotels (or listings), indexed 0..n-1. - For each hotel i, an unsort...
Find a split-stay booking across listings
You are implementing a simplified split-stay search. You are given: - A desired trip interval [start, end), where dates are represented as integers (e...
Compute split-stay listing pairs
Given a set of Airbnb listings, each with availability represented as a sorted list of day integers, and a requested inclusive date range [S, E], comp...
Design a scalable notification system
Problem Design a notification system for a company at Airbnb-like scale that can send notifications to different user types (e.g., customers/guests, h...
Maximize sum with no adjacent tree nodes
Given the root of a binary tree where each node contains an integer value (can be 0 or positive), choose a subset of nodes such that no selected node ...
Design a user activity query system
Problem Design a query system that allows internal consumers (e.g., customer support, risk/fraud, data analysts) to retrieve a given user's search act...