Red Apple Technologies Nodejs Developer interview questions

Difference: useEffect vs useLayoutEffect; Virtual Dom vs Real Dom; Javascript event loop vs Nodejs event loop; var vs let vs const Purposes of Memoization, React.memo, useMemo and useCallback; Phases of Nodejs event loop Different status codes(Ex:500) Nodejs is single threaded or not Context API Explain call, apply, bind and their differences How to achieve session in express, and its purposes Memory leakage in Nodejs One question from mongodb