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35 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · ML system design · System design
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Given an org chart, write an algorithm to determine the lowest common parent of a list of children. Expected to build the graph on my…
Companies: Spotify, Amazon, Atlassian, Microsoft
Last reported Sep 2026
Companies: Spotify
ML System Design
Last reported Aug 2026
Companies: Spotify
ML System Design
Last reported Jul 2026
Given timestamped website visits by users, find the 3-website sequence (in chronological order) that is visited by the largest number of unique users (count each…
Companies: Spotify, Amazon
Array · Hash Table · Sorting · String
Last reported Jul 2026
Design a system that allows users to upload and manage custom images for their playlists, where images are publicly accessible but only modifiable by the…
Companies: Spotify
Last reported Jul 2026
Companies: Spotify, Tesla
Last reported Jul 2026
Companies: Spotify, Capital One
Last reported Jul 2026
Given an array and window size k, return the median of each sliding window as it moves right by one. The core challenge is maintaining…
Companies: Spotify, Meta, Microsoft
Last reported Jun 2026
Given an array of non‑negative integers encoded as decimal strings (no leading zeros) and an integer k, return the k-th largest numeric value treating duplicates…
Companies: Spotify, Evernorth, Meta
Last reported Jun 2026
Companies: Spotify, Adyen, Amazon, Anthropic +37
Last reported Jun 2026
Design a low-latency ad banner delivery system for the Spotify desktop app that serves ad creatives for a given ad slot, rotating ads approximately every…
Companies: Spotify
Last reported May 2026
Companies: Spotify, CrowdStrike, Meta, Monzo +3
Last reported May 2026
Companies: Spotify, Amazon, Bloomberg, Capital One +3
Last reported May 2026
Find the length of the longest contiguous substring that contains no repeated characters. This is a classic sliding-window / two-pointer problem where you track seen…
Companies: Spotify, Amazon, Apple, Autodesk +12
Hash Table · Sliding Window · String
Last reported May 2026
Companies: Spotify, Amazon, Apple, Bloomberg +11
Last reported May 2026
Companies: Spotify, Amazon, Anthropic, Google +6
Last reported Apr 2026
Given a 2D grid containing empty rooms/spaces (INF), walls/obstacles (-1), and gates (0), fill each empty room with the shortest distance to its nearest gate…
Companies: Spotify, DoorDash, Microsoft
Last reported Apr 2026
Design a backend system for an online booking platform that allows customers to view availability and book appointments while enabling businesses to manage their schedules…
Companies: Spotify
Last reported Feb 2026
Companies: Spotify
Last reported Feb 2026
Companies: Spotify
Last reported Feb 2026
Design an ad server system that delivers targeted advertisements to users based on their preferences and behavior, while optimizing for performance and revenue.
Companies: Spotify, Amazon, Google
Last reported Jan 2026
Companies: Spotify, Amazon, Anthropic, Capital One +6
Last reported Jan 2026
Companies: Spotify, Amazon, Meta, Netflix +4
Last reported Jan 2026
Design a system that generates and manages images for music playlists, allowing users to create custom playlist covers, apply templates, and automatically generate images based…
Companies: Spotify
Last reported Oct 2025
Create a playlist of the most frequently played songs for a user based on the play count.
Companies: Spotify, Amazon
Last reported Sep 2025