What are some ways to improve the performance of a website?

You should review your web development methodologies, processes, procedures, and techniques when preparing for an interview. Since you'll be asked many questions about these, having them in front of your mind is important. If you are interviewing remotely, you may want to have a list of these available that you can refer to during the questioning.

"There are many different techniques you can use to improve the website's performance. Some of these involved optimizing the code, while others require you to cache objects, avoid excessive operations, or optimize network performance. Some of the more common methodologies I employ include Utilizing versatile pictures, implementing store, reserve, store processes, joining pictures into CSS sprites, enabling HTTP keep-alive reaction headers, and minimizing the use of JavaScript and CSS."