CAT DILR — Data Interpretation and Logical Reasoning — is the most volatile section in the entire exam. A candidate can ace QA and VARC, yet crash to the 40 percentile in DILR simply by picking the wrong sets. In this complete breakdown, a DILR expert walks you through every set type, the DI vs LR split, hybrid sets, the exact scoring scheme, IIM sectional cutoffs, and a systematic preparation plan. Updated for CAT 2026. Practice daily on CATMock.