Google JavaScript Technical Interview (Callbacks, Promises, Await/Async)

Web Developers Tomorrow

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Takeaways from reading this article

learn following things:

1. Callbacks

• What is a Callback in JavaScript
• Callbacks in real Life

2. Callbacks vs. ES6 Promises & Await / Async

• Why Promises
• What are Promises
• How Promises resolves Callback Hell

Sample problems (one of them is an actual Callback problem I had from the Interview)

Q1. Print the letters A, B, C in that order in callback , Promise , Async / Await

Q2. Print the array of list [A, B, C] in the order