#async

8 async interview questions, asked at Airbnb, Amazon, Apple and 5 more companies. Last asked Sep 2026.

Send requests in batches of five and retry failures after a delayCodingDeliver a list of requests to an API that accepts at most five requests per call. Some requests in a call can fail; a failed request may be retried only after its own delay has…
Last asked Sep 2026
React typeahead with async suggestions and keyboard navigationCodingBuild a typeahead in React: a search input with a dropdown of suggestions that come from an asynchronous source while the user types. The user can pick a suggestion with the mouse…
Last asked Sep 2026
First successful result from parallel calls under a global timeoutCodingA backend API is slow and sometimes fails. To answer quickly, call several of these functions in parallel and return the first result that succeeds. Write a function that takes…
Last asked Sep 2026
Accessible popovers that load dataCodingBuild popovers for several buttons on a page: each button opens its own popover, which loads its data when opened. Make them accessible and handle the loading state.
Last asked Aug 2026
Generic retry helper with configurable backoffCodingCalls to remote services fail now and then for reasons that go away on their own: a dropped connection, a busy server, a timeout. Write a generic retry helper that runs a…
Last asked Aug 2026
Autocomplete data fetching with debounce, retry and cachingCodingThe UI of an autocomplete box is already built; you write only the data-fetching logic behind it. Debounce requests while the user types, retry requests that fail, show only the…
Last asked Apr 2026
Assemble objects from chunks of an async streamCodingReads from an asynchronous stream return arbitrary chunks of bytes, so one object can be split across reads and one read can hold several objects. Write code that buffers the…
Last asked Feb 2026
React hook for API data and UI changes in a starter appCodingIn a starter React app with API and UI code already written: write a hook that fetches data from the API and converts it to the shape the UI needs, then change the UI as asked…
Last asked Sep 2025