Interview questions

Garage Management System

Review the implementation of methods and tests for a garage management system. Evaluate code correctness, test coverage, and overall design decisions.

Companies: Bloomberg

Last reported Sep 2026

Compare Threads and Processes for Image Processing

Companies: Anthropic

Concurrency · Operating Systems

Last reported Sep 2026

Expiring GPU Credit Ledger with Out-of-Order Events and Point-in-Time Balance

Companies: OpenAI

Data Structure Design · Heaps & Priority Queues

Last reported Sep 2026

Design a Logging Library with Severity Filtering, Rate Limiting, and Aggregation

Implement a logging library across 4 progressive phases: severity-based filtering, unit testing, throttling to suppress duplicate logs within a time window, and aggregation to…

Companies: LinkedIn

Last reported Sep 2026

Review Unbounded API GET Endpoint

Review an API GET endpoint that fetches all records without pagination, causing performance issues at scale. Update both the backend endpoint and frontend to support…

Companies: Solace

Last reported Sep 2026

Three-Card Game: Deal Hands, Rank Them, Then Add a Flush Category

Companies: OpenAI

Low-Level Design (OOP) · Testing & Quality

Last reported Sep 2026

Make a Hostname-Limited Crawler Concurrent

Companies: Anthropic

Concurrency · Graphs

Last reported Sep 2026

LLM-Based Document Q&A System

Review a Technical Requirements Document (TRD) for an LLM-based system that answers user questions based on their uploaded documents. Identify issues and provide constructive…

Companies: Canva

Last reported Sep 2026

Build a Discord-like Chat Server

Build a real-time chat server that supports core messaging features such as sending and receiving messages, creating and joining chat rooms, and tracking online users.

Companies: Discord

Last reported Sep 2026

Code Review: Batched Processor Fallback and Capacity Bug

A PR replacing a synchronous processor with a batched processor fails to fall back to the synchronous processor if the batched processor cannot be created…

Companies: Datadog

Last reported Sep 2026

Implement a URL Shortener

Design and implement a URL shortener application with a UI, deployed on Docker. Extend the application to support user authentication, enabling personalized URL management for…

Companies: Persona Identity

Last reported Sep 2026

Rover CLI Navigation System

Create a command line application that controls a rover on a 2D plane, allowing it to turn directions and move forward based on user commands…

Companies: Shopify

Last reported Sep 2026

Rule-Based Fraud Transaction Detection

Implement a fraud detection system that evaluates transactions against a sequential list of text-based rules, where each transaction is represented as a dictionary of…

Companies: Stripe

Last reported Sep 2026

Build a Rectangle Board with Remove-at-Cell, Batch Remove, and Undo

Companies: OpenAI

Data Structure Design · Low-Level Design (OOP)

Last reported Aug 2026

Review and Improve Four AI-Assisted TypeScript Pull Requests

Companies: Anthropic

AI-Assisted Development · Code Quality & Maintainability

Last reported Aug 2026

Build a Compose Rating Form with Validated Submission State

Companies: OpenAI

Android · State Management

Last reported Aug 2026

Design a Localized Usage-Limit Response and Compose Snackbar

Companies: OpenAI

Android · API Design

Last reported Aug 2026

Design Distributed Sorting Around an Explicit Helper Contract

Companies: Anthropic

Batch & Stream Processing · Sorting

Last reported Aug 2026

Model Infection, Immunity, Delayed Death, and Burn Interventions on a Grid

Companies: OpenAI

Grids & Matrices · Simulation & State Machines

Last reported Aug 2026

Compute Exact Mode and Median Across Distributed Nodes

Companies: Anthropic

Last reported Aug 2026

Design a Chatbot with Object-Oriented Principles

Companies: OpenAI

Last reported Aug 2026

Implement a Duplicate-File Reporter

Companies: Anthropic

File & Media Storage · Testing & Quality

Last reported Aug 2026