🚀🔍 Senior-Level JavaScript Promises Interview Questions and Real-World Scenarios — Part 2

Introduction

Welcome back, fellow JavaScript enthusiasts! 🎉 In the first part of our deep dive into JavaScript Promises, we tackled advanced topics like implementing timeouts with Promise.all, creating retry mechanisms, and handling errors in promise chains. If you haven't checked it out yet, I highly recommend giving it a read. 😉

In this second part, we’ll explore even more complex scenarios and interview questions that senior developers often encounter. We’ll delve into async/await, custom promise implementations, and other real-world use cases that will sharpen your asynchronous programming skills. So, let's get started! 🏃‍♂️

1. How Do You Handle Errors in Async/Await Syntax?

📝 Scenario: You’re using async/await to handle asynchronous operations, but you need a robust way to catch and handle errors, including those in nested async functions.

💡 Explanation:

When using async/await, errors thrown inside the async function are wrapped in a rejected…