the-event-loop

Question 1

What is the JavaScript Event Loop?

Answer 1

The event loop takes whatever is on the task queue and pushes it on the call stack, but only if and when the call stack is empty.

Question 2

What is difference between “blocking” and “non-blocking” with respect to how code is executed?

Answer 2

Blocking code means that there is a piece of code that is running and nothing else can happen. Until that piece of code is run, nothing else can run.
Non-blocking code is when a function can be run on the side while the rest of the code is processing or executing. setTimeout() is an example of non-blocking code.