The US has plenty of exams, starting in early primary school. All states have Standards of Learning (SOL) exams every few years on the main subjects. Then, starting in high school, you have a combination of Advanced Placement (AP) subject exams (college level, often granting college credit) or International Baccalaureate (IB) exams, Scholastic Aptitude (SAT) or American College Test (ACT), SAT2 subject exams, and probably a few I've forgotten.

The SAT or ACT are technically the only ones "required" for college, but most of the elite schools expect AP or IB (which tends to give the students a year or two of calculus, a fourth year of foreign language, and some deeper dives into other sciences or social studies).

But, because it's split across so many tests, there's no single "score poorly and your life is ruined" exam.