Preparing for a ๐ก๐ผ๐ฑ๐ฒ.๐ท๐ ๐ถ๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ can feel overwhelming, especially if youโre just starting your journey as a backend developer. To help you get ready, here are the ๐๐ผ๐ฝ ๐ญ๐ฌ ๐ก๐ผ๐ฑ๐ฒ.๐ท๐ ๐ถ๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ ๐พ๐๐ฒ๐๐๐ถ๐ผ๐ป๐ ๐ฎ๐ป๐ฑ ๐ฎ๐ป๐๐๐ฒ๐ฟ๐ every beginner should know in 2025.
๐ญ. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐ก๐ผ๐ฑ๐ฒ.๐ท๐?
Node.js is a ๐๐ฎ๐๐ฎ๐ฆ๐ฐ๐ฟ๐ถ๐ฝ๐ ๐ฟ๐๐ป๐๐ถ๐บ๐ฒ ๐ฒ๐ป๐๐ถ๐ฟ๐ผ๐ป๐บ๐ฒ๐ป๐ built on Chromeโs V8 engine that allows you to run JavaScript code outside the browser, mainly used for server-side development.
๐ฎ. ๐ช๐ต๐ ๐๐๐ฒ ๐ก๐ผ๐ฑ๐ฒ.๐ท๐?
Itโs lightweight, fast, and built for ๐๐ฐ๐ฎ๐น๐ฎ๐ฏ๐น๐ฒ, ๐ฒ๐๐ฒ๐ป๐-๐ฑ๐ฟ๐ถ๐๐ฒ๐ป ๐ฎ๐ฝ๐ฝ๐น๐ถ๐ฐ๐ฎ๐๐ถ๐ผ๐ป๐, making it ideal for real-time systems like chats and streaming platforms.
๐ฏ. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐ป๐ฝ๐บ?
๐ป๐ฝ๐บ (๐ก๐ผ๐ฑ๐ฒ ๐ฃ๐ฎ๐ฐ๐ธ๐ฎ๐ด๐ฒ ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐ฟ) manages packages and dependencies in Node.js, enabling developers to reuse and share code efficiently.
๐ฐ. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐๐ต๐ฒ ๐ฑ๐ถ๐ณ๐ณ๐ฒ๐ฟ๐ฒ๐ป๐ฐ๐ฒ ๐ฏ๐ฒ๐๐๐ฒ๐ฒ๐ป ๐๐๐ป๐ฐ๐ต๐ฟ๐ผ๐ป๐ผ๐๐ ๐ฎ๐ป๐ฑ ๐ฎ๐๐๐ป๐ฐ๐ต๐ฟ๐ผ๐ป๐ผ๐๐ ๐ฝ๐ฟ๐ผ๐ด๐ฟ๐ฎ๐บ๐บ๐ถ๐ป๐ด?
Synchronous code executes line by line, while asynchronous code allows multiple operations to run simultaneously without blocking the main thread.
๐ฑ. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐ฎ๐ป ๐๐๐ฒ๐ป๐ ๐๐ผ๐ผ๐ฝ?
The ๐๐๐ฒ๐ป๐ ๐๐ผ๐ผ๐ฝ allows Node.js to handle multiple requests concurrently using a single thread.
๐ฒ. ๐๐ ๐ฝ๐น๐ฎ๐ถ๐ป ๐ฐ๐ฎ๐น๐น๐ฏ๐ฎ๐ฐ๐ธ๐.
Callbacks are functions passed as arguments to other functions and executed after an operation completes.
๐ณ. ๐ช๐ต๐ฎ๐ ๐ฎ๐ฟ๐ฒ ๐ฃ๐ฟ๐ผ๐บ๐ถ๐๐ฒ๐ ๐ฎ๐ป๐ฑ ๐ฎ๐๐๐ป๐ฐ/๐ฎ๐๐ฎ๐ถ๐?
They simplify asynchronous programming, making code easier to read and maintain compared to traditional callbacks.
๐ด. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐๐ ๐ฝ๐ฟ๐ฒ๐๐.๐ท๐?
A lightweight ๐ณ๐ฟ๐ฎ๐บ๐ฒ๐๐ผ๐ฟ๐ธ ๐ณ๐ผ๐ฟ ๐ก๐ผ๐ฑ๐ฒ.๐ท๐ used to build APIs and web applications quickly.
๐ต. ๐๐ผ๐ ๐ฑ๐ผ ๐๐ผ๐ ๐ต๐ฎ๐ป๐ฑ๐น๐ฒ ๐ฒ๐ฟ๐ฟ๐ผ๐ฟ๐ ๐ถ๐ป ๐ก๐ผ๐ฑ๐ฒ.๐ท๐?
Using ๐๐ฟ๐/๐ฐ๐ฎ๐๐ฐ๐ต ๐ฏ๐น๐ผ๐ฐ๐ธ๐, error-handling middleware, and Promise .catch() methods.
๐ญ๐ฌ. ๐ช๐ต๐ฎ๐ ๐ถ๐ ๐บ๐ถ๐ฑ๐ฑ๐น๐ฒ๐๐ฎ๐ฟ๐ฒ?
Middleware functions process requests before reaching the final route handler in Express.js.
๐๐ผ๐ป๐ฐ๐น๐๐๐ถ๐ผ๐ป
Mastering these basics gives you a solid foundation to ace your ๐ก๐ผ๐ฑ๐ฒ.๐ท๐ ๐ถ๐ป๐๐ฒ๐ฟ๐๐ถ๐ฒ๐ and build confidence as a backend developer.
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