What is the difference between spawn() and exec()?

Both create child processes, but:

• spawn() streams data (good for large outputs)
• exec() buffers data (good for small outputs)

const { spawn, exec } = require('child_process');

// spawn example

const ls = spawn('ls', ['-lh', '/usr']);
ls.stdout.on('data', (data) => console.log(`Output: ${data}`));

// exec example

exec('ls -lh /usr', (error, stdout) => console.log(stdout));