Which type of programming should you use to determine whether the room is still available when the request is made?

You are writing a Web application that processes room reservation requests. You need to verify that the room that a guest has selected is not already reserved by another guest.

Which type of programming should you use to determine whether the room is still available when the request is made?
A . functional
B . dynamic
C . in-browser
D . server-side

Answer: D