What are the main differences between browser and server JavaScript?
Browser JS has the DOM, window, fetch, and a sandbox. Server JS has fs, http, process, full system access, and no DOM. They share the language but differ in environment, APIs, and security model.
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More FAQs in Server-Side JavaScript and Node.js Interview Questions
Through Node.js, which uses the V8 engine to compile and execute JS. Unlike the browser, server JS has access to the file system, network, and processes through libuv, which provides async I/O.
A single-threaded loop that processes callbacks from completed async operations. It handles I/O asynchronously through libuv while processing one callback at a time, which makes Node.js non-blocking.
Blocking code stops the thread until it completes. Non-blocking code initiates the operation and processes the result via a callback when done. Always prefer non-blocking async APIs in Node.js to keep the event loop free.
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