CAT Registration 2024: Opens in August 1st Week; Check Fees, Step by Step Process. CAT exam on November 24, 2024 in three slots of 2 hours duration each. First step is to visit Official CAT Website -- IIMCAT.ac.in. Look for section that says ‘New Candidate Registration’. You need to click this button to Register as New User. Once you click ‘Register’, a new page titled ‘Register to get User ID and Password’ will open at CAT 2024 official website. Immediately on completion of CAT exam registration page, you will get the message ‘Registration Successful’ along with the CAT 2024 User Id and Password.