What's the best choice for a server response code if a page doesn't exist?

I think 404 not found is the best server response code if a page doesn't exist.

Hi Friends,
An HTTP status code is a server response to a browser's request. When you visit a website, your browser sends a request to the site's server, and the server then responds to the browser's request with a three-digit code: the HTTP status code.

It's important for every professional SEO and website owner to understand the status codes that have the biggest impact on SEO.

• HTTP Status Code 200 - OK
• 
  HTTP Status Code 301 - Permanent Redirect
• 
  HTTP Status Code 302 - Temporary Redirect
• 
  HTTP Status Code 404 - Not Found
• 
  HTTP Status Code 410 - Gone
• 
  HTTP Status Code 500 - Internal Server Error
• 
  HTTP Status Code 503 - Service Unavailable