1. Explain why do we want sometimes to use setImmediate instead of using setTimeout?
2. Explain the difference between process.nextTick and setImmediate?
3. Name 10 core modules that Node provides by default, and 10 of the Global objects?

Write a function in Node factorial(n) to find asynchronously the factorial of a number. Write your observation (CPU, RAM.. etc) on what happens in Node Process when we calculate the factorial of a large number.

• factorial(3) is 3 * factorial(2)
• factorial(2) is 2 * factorial(1)
• factorial(1) is 1 * factorial(0)
• factorial(0) is 1

// your Node code here...
console.log('start');
factorial(3).then(console.log); 
console.log('end');

// Test your code in Node.JS CLI, Output:
// start
// end
// 6