#state management

9 state management interview questions, asked at Anthropic, Apple, Cohere and 6 more companies. Last asked Sep 2026.

React social feed with voting, re-sorting and pinned postsCodingBuild a feed page in React. Each post can be upvoted or downvoted, and after every vote the feed re-sorts by score, highest first. A post can be pinned, and pinned posts stay at…
Last asked Sep 2026
Design a Terraform provider for a cloud resourceSystem designYou work on infrastructure at a cloud provider. Customers want to manage one of your resources with Terraform: declare it in config, apply it, change it later and destroy it the…
Last asked Sep 2026
Design a real-time comment feed with optimistic updatesSystem designDesign the front end of a comment section where other people's comments arrive live and the viewer can post their own. The focus is optimistic posting: a submitted comment shows…
Last asked Sep 2026
Rectangle board with remove-at-cell, batch remove and undoCodingBuild a RectangleBoard that holds axis-aligned rectangles on a grid of width columns and height rows. Cells use zero-indexed (x, y), where x is the column and y is the row. A…
Last asked Aug 2026
Design calendar front-end state for recurring eventsSystem designDesign the client-side state for a calendar app that supports recurring events. Cover how recurrence rules are stored versus expanded into visible occurrences, how a single…
Last asked Aug 2026
Parking lot manager in ReactCodingBuild a small React app that manages a parking lot: show the spots and whether each is free, let vehicles park and leave, and keep everything on screen in sync. The round focuses…
Last asked May 2026
React Battleship boardCodingIn React, build the board for the game Battleship (just the board, no opponent logic). Each cell can be clicked to change its state (empty, hit, miss), and the board shows which…
Last asked Apr 2026
Multi-step form in ReactCodingBuild a three-step form: step 1 collects the user's basic details, step 2 their address, and step 3 shows everything for confirmation and submits. Support validation on each step…
Last asked Sep 2025
Design the front end of a desktop AI chat appSystem designDesign the client side of a desktop chat app for an AI assistant: the conversation list, the chat view and the model's replies as they stream in. This is a front-end system design…
Last asked Sep 2025