Tips, Tricks, and Techniques for Node.js Development 3.1: All about Time

This video tutorial covers the event loop in Node.js, explaining its phases and how asynchronous code is handled. It discusses callbacks, promises, generators, and async/await. The tutorial also provides code examples to demonstrate the behavior of setTimeout, setImmediate, and process.nextTick, highlighting how they interact with the event loop.

What is the primary purpose of the event loop in JavaScript?

• To optimize memory usage

• To handle synchronous operations

• To compile JavaScript code

• To manage asynchronous operations

Which phase of the event loop handles callbacks from setTimeout and setInterval?

• Timer phase

• Check phase

• Close callbacks phase

• Poll phase

What is the role of the 'check' phase in the event loop?

• To manage timers

• To process I/O events

• To execute close callbacks

• To handle setImmediate callbacks

In the event loop, which function is guaranteed to execute after the current operation completes, regardless of the current phase?

• setTimeout

• process.nextTick

• setInterval

• setImmediate

When using setTimeout and setImmediate, which one is guaranteed to execute first?

• setImmediate

• setTimeout

• Both execute simultaneously

• Neither, it depends on the event loop phase