Some Middleware past exam questions

[Thing Person]

1) Consider a HTTP server that recieves an incoming request whila another request is currently being served. Explain how the server handles this situation. In your answer you should assert whether the new request will be either served instantly, queued or ignored.

2) Name three typical advantages of embedded PHP code over CGI scripts.

3) With asynchronous requests it is possible to develop responsive and comfortable user interfaces to web applications. These conveniences are, however, gained by giving up an important principle of standard WWW inferfaces.
Describe this principle and give an example of a function or service that relies on it.