Practise interview questions by skill and experience level, then take a timed test. Every answer comes with an explanation of why it is right and why the other options are wrong.
JavaScript interview questions for freshers and mid-level developers: core language concepts, Node.js and React, each with the answer and an explanation of why the other options are wrong.
Node.js interview questions for freshers to senior developers: modules, the event loop, streams, Express, scaling with workers and clusters, and production operations, each with a worked explanation.
React interview questions from fresher to senior level: JSX, props and state, hooks, effects, performance, and React 19 features like Actions, useActionState and Server Components, each with an explanation.
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30 Qs
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Coding problems
Write real code in JavaScript or Python, run it against tests in your browser, and read a full solution when you're done.