🔄 Asynchronous vs Synchronous

• Asynchronous: More than one process running simultaneously.
• Synchronous: One process executing at a time.
• JavaScript is synchronous by default, while Node.js is asynchronous.

⚙️ libuv and Event Loop

• libuv is the library that includes the event loop.
• The event loop loops over a queue of events, then uses V8 as a callback processor.

🚫 Non-blocking I/O

• Non-blocking means performing tasks without stopping the entire program.

🧠 Buffers

• A Buffer is a temporary holding spot for data that moves data from one place to another.
• Buffers can store, encode, and manipulate binary data.

const buf = Buffer.from('Hello World', 'utf-8');
console.log(buf.toString());
console.log(buf.toJSON());
console.log(buf[2]);
buf.write('h');
console.log(buf.toString());

🌊 Streams

• A Stream is a sequence of data made available over time (e.g., video streaming).
• Buffers and Streams can be combined to collect full data before making it available (e.g., like films).

📚 ES6 and Buffers

• New ES6 syntax in JavaScript supports Buffers unlike older versions.

📂 File System (Sync)