When a topic is created on Stackoverflow, does a new html file get created or is it one file that gets changed based on the topic the user picks?

Specifically, when I create a new question and it is titled "My question," in the url bar it is going to send me to something like: "http://ift.tt/2iNbsjR". Does this mean that a new file called "My question" was created or is this question placed in a database as an object and then displayed on a single template for all questions? Thank you.