Stack Overflow lacks a "Hot" questions tab. However, the other sites (Server Fault, Super User, and Meta Stack Overflow) possess this Tab.
Was this intentional? That is, to avoid "loitering" in Hot Questions, and encourage people to spend more time in Unanswered questions.
Or was the "Active" Tab its new replacement, simply renamed to sound more professional? I know little about the "Hot" ranking algorithm vs. the "Active" ranking algorithm, so it is entirely possible they are one in the same. (Although, judging from this post, I don't think this is the case.)
Edit: The following is what I see:
As it turns out, Gamecat's answer is correct, as the Hot tab is not present on the "Questions" page. The above image is what is shown on the "Questions" page.