Explain how to read a file in Node.js.

Node.js provides the fs (File System) module to interact with the file system. You can read a file asynchronously using fs.readFile(). Example:

const fs = require('fs');
fs.readFile('example.txt', 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});