Essential JavaScript Interview Questions for 2023: Intermediate Level

You’re in the right place if you want to push your skills to the next level after mastering the <a href="https://medium.com/stackademic/ready-for-your-2023-javascript-interview-warm-up-questions-to-prepare-you-9a0561fd2b66" rel="noopener">basics of JavaScript interview questions</a>. This article dives deep into the questions you can expect in intermediate-level JavaScript interviews. However, excelling in interviews is not the only aspect. Understanding closures and asynchronous programming is crucial for becoming an effective and confident developer. <h2>1. Asynchronous JavaScript</h2> Imagine you’re building a weather application. You can’t halt the entire app to fetch weather data. Here, asynchronous programming methods like callbacks, promises, and async/await come to your rescue. Question: What is ‘callback hell’ in the context of using callbacks, and what are its disadvantages? Answer: “Callback hell” is used when you have many nested callbacks in our code. Think of it as a layer cake of functions where each layer depends on the one above it. This makes our code look like a pyramid, often called the “Pyramid of Doom.” The downside? It makes our code hard to read and even harder to debug. Plus, each new layer adds complexity, making future changes a headache. <a href="https://medium.mmainulhasan.com/essential-javascript-interview-questions-for-2023-intermediate-level-af95ead56a3e">Read More</a>