The CAT exam format consists of three sections that must be completed within 180 minutes. Each section is one hour and covers a different subject area. The verbal section contains 24 reading comprehension questions testing skills like summary and sentence elimination. The DI and LR section contains 16 data interpretation questions and 16 logical reasoning questions. Finally, the quant section contains 34 math questions testing topics like numbers, geometry, averages, and probability. The document provides a high-level overview of the section breakdown and question types in the CAT exam.