There is no specific exam pattern for CAT and it keeps on changing every year. Typically the pattern is as follows...
|Section||Number of Questions|
|Data Interpretation and Logical Reasoning||32|
CAT as per its reputation, continues to deviate the paper pattern with reference to the number of questions in the sections and scores allocated for various sections.Every candidate should cross the minimum cut off expect from each section, to feel safe in terms of score.