AI solution for Interview Question on BFE.dev
20. What happens when you type a URL in browser's address bar?

Here's a more detailed answer:

1. The browser checks its cache (temporary storage) to see if it already has the page requested.
2. If the page is not in cache, the browser sends a DNS (Domain Name System) lookup request to find the IP address of the server associated with the requested URL.
3. Once the browser gets the server's IP address, it sends a HTTP (Hypertext Transfer Protocol) request to the server.
4. The server processes the request and sends back a response typically containing HTML, CSS, and/or JavaScript files.
5. The browser receives and renders the web page based on the files received from the server.
6. The page may have additional resources such as images, videos or other files, so the browser will send additional requests for those files as needed.
7. As the page is rendering, the browser will execute any JavaScript on the page which may trigger additional requests, such as making requests to APIs or databases.

Overall, there are several steps involved in the process of typing a URL into the address bar, including DNS lookup, HTTP requests, and rendering the page in the browser.