There are no quarters in college basketball games. Instead, there is a first half and a second half. Most other basketball leagues have four different-length quarters.
College basketball has been around for a long time and has a lot of history. Since the rules were set, the game has had a first half and a second half. Each half is 20 minutes long, so a game without overtime is 40 minutes long.
International basketball games last for 40 minutes, but they are split into four 10-minute segments. The NBA game is 48 minutes long, which is made up of four 12 minute quarters. Most high school games also use quarters, but they are usually over in less than 40 minutes.