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58 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · ML system design · Object-oriented design · Practical engineering · System design
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Showing 26–50
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: Atlassian, Amazon, Microsoft, Spotify
Last reported Jan 2026
Design a highly scalable system that tracks and computes the top K trending hashtags (e.g., top 30-50) across different time windows (last 5/15/30/60 minutes or…
Companies: Atlassian, Google, LinkedIn, Meta +1
Last reported Dec 2025
Design and implement a file search system that can traverse directory structures and locate files based on various criteria. The solution should incorporate object-oriented…
Companies: Atlassian, Amazon, Anduril, Google +1
Last reported Dec 2025
Design a system to store and retrieve a general-purpose hierarchical tree structure with the following characteristics: nodes can represent any data (e.g., file system entries…
Companies: Atlassian
Last reported Dec 2025
Design a unified tagging system for Atlassian products (JIRA tickets, Confluence documents, Bitbucket PRs) that allows users to add/remove/update tags on any content, click…
Companies: Atlassian
Last reported Dec 2025
Given a binary tree and two nodes p and q, find their lowest common ancestor (LCA) — the deepest node that has both p and…
Companies: Atlassian, Amazon, Apple, Canva +6
Binary Lifting · Binary Tree · Depth-First Search · Lowest Common Ancestor
Last reported Dec 2025
Design a news aggregation system like Google News that allows users to subscribe to different news sources, categories, and topics, then view a personalized real-time…
Companies: Atlassian, Amazon, Google, Meta +6
Last reported Dec 2025
Design a system to rank news feed items based on relevance, user preferences, and other factors.
Companies: Atlassian, DoorDash, Meta, Rippling
Last reported Nov 2025
Companies: Atlassian
ML System Design
Last reported Nov 2025
Companies: Atlassian, Amazon, Confluent, Datadog +9
Last reported Nov 2025
Companies: Atlassian, Apple, Bloomberg, Coursera +7
Last reported Nov 2025
Implement a system to track customer ratings for agents and return agents sorted by average rating in descending order. Extend the solution to find the…
Companies: Atlassian
Last reported Nov 2025
Determine (1) the user who rated the most distinct movies by aggregating MovieRating and breaking ties by the lexicographically smallest user name, and (2) the…
Companies: Atlassian, Rippling
Last reported Nov 2025
Design a Snake game class with a 40x30 screen, wrapping boundaries, automatic growth every 5 moves, and collision detection for game over conditions.
Companies: Atlassian, Watershed
Last reported Oct 2025
Maintain a collection of foods with dynamic ratings that supports updating a food's rating and querying the highest-rated food for a given cuisine (ties broken…
Companies: Atlassian
Last reported Jun 2025
Given a list of intervals [x_start, x_end] (endpoints inclusive), find the minimum number of points on the x-axis (vertical arrows) such that each interval contains…
Companies: Atlassian, Amazon, Expedia, Google
Array · Greedy · Sorting
Last reported Jun 2025
Discuss your most impactful project, including your role, scope, and the impact.
Companies: Atlassian, DoorDash, Microsoft
Last reported May 2025
Companies: Atlassian, Amazon, Coinbase, DoorDash +1
Last reported Apr 2025
How did you create a timeline for the project?
Companies: Atlassian, Amazon, Expedia, Meta +1
Last reported Apr 2025
Companies: Atlassian, DoorDash, Etsy, Expedia +2
Last reported Apr 2025
Companies: Atlassian, DoorDash, Expedia, Meta +1
Last reported Apr 2025
Companies: Atlassian, Amazon, Meta, OpenAI +2
Last reported Apr 2025
Convert each target letter to its board coordinates and output a shortest sequence of moves (U/D/L/R) plus '!' to spell the string by walking between…
Companies: Atlassian
Hash Table · String
Given an array of daily stock prices, compute the maximum profit achievable from exactly one buy-before-sell transaction (i.e., the largest prices[j] - prices[i] with j…
Companies: Atlassian, Adobe, Amazon, Apple +10
Array · Dynamic Programming
Durable timed execution: recurring occurrences, reliable dispatch, worker leases, retries, and duplicate side effects.
Companies: Atlassian, Amazon, DoorDash, Google +3
backpressure · durable-queues · fault-tolerance · idempotency