Hey as per my idea there is no limit of attempt for CAT exam so here I am giving you its basic details

Qualification
Candidate should be graduate from recognised university
Final year candidate can also apply

Limit
There is no limit of CAT exam attempt

Duration
CAT exam is conducted once in a year in November month

Exam pattern
The total duration for the exam was 180 minutes and had 100 questions.
Candidates were not allowed to switch between sections, unlike previous year.
For the first time in the history of CAT, applicants were allowed to use an on-screen calculator for calculations.
Also, some Type In The Answer (TITA) type questions were introduced, wherein candidates had to type the answers to those questions in a box provided.

Sections
Data interpretation
Quantitative aptitude
Reasoning
English