What do they test in the JavaScript/React deep dive round?
Depth of understanding, not just usage. Topics: closures, event loop, this keyword, call/apply/bind, promises, hooks, reconciliation, virtual DOM, state management, performance optimization.
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More FAQs in The Web Developer Interview Process Explained
Typically 5 rounds: machine coding (90 min, build a UI), DSA (45-60 min, algorithm problems), frontend system design (45-60 min, design a large system), JavaScript/React deep dive (45-60 min, deep questions), and hiring manager / behavioral (45-60 min, past projects and teamwork).
Read the problem carefully (5 min), clarify requirements, plan the structure (HTML, state, events), build the core functionality first, then add edge cases and polish if time remains. Time management is key.
Clarify requirements, high-level design (components, data flow), API design (REST/GraphQL), state management, rendering strategy (CSR/SSR/SSG), and performance/accessibility/error handling. Discuss trade-offs. Communicate clearly.
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