What is the expected console output of the following?

fs.write.js

var fs = require('fs');

fs.open('hello-world.txt', 'ax', function (err, fd) {
  if (err) {
    console.error(err);
  }

  fs.write(fd, new Buffer('hello world'), function (err) {
    if (err) {
      console.log('manual', 'noooo');
    } else {
      console.log('manual', 'yay');
    }
  });
});