How does event queue is processed in Node js?

Question

I am learning through the architecture of Node.js. I have following questions.

1) Is event loop a part of libuv or v8?

2) If event loop is responsible for delegating the blocking call to libuv and putting the callback to the event queue, than how does the callback present in event queue goes to call stack for execution?

3) How v8 and libuv interact with each other in Node.js?

Diagram showing the Node Js architecture.

**Can anybody explain me how does v8 gets back the data from event queue to process it in the given diagram?

Event Loop Diagram

Now can someone tell me which diagram shows the correct position of event loop in Node js architecture?

Answer 1

1. Eventloop will be part of LIBUV
2. process.nextTick() taken care by LIBUV. Eventloop internally uses timers, I/O callbacks, idle or process, poll (incoming requests), check, close I/O callback, and connect to timers.
3. V8 engine takes care of connecting jscode or application to nodejs API.