FRQ Question 1 on the AP Microeconomics exam will cover perfect competition (short-run profit/loss, long-run adjustment) and externalities (positive/negative, allocative efficiency, socially optimal, deadweight loss, graph drawing).
"this year on set one I think you're going to see sideb side graphs for perfect competition so drawing a profit or a loss in the short run and the next part of the question is going to ask you about putting it back in the long run then the question is going to switch up and start talking about externalities either positive or negative externality... so I think it's perfect competition and externalities on question one"