IIM Ahmedabad - Indian Institute of Management

Hi,
Each university has its own criteria.
IIM Ahmedabad Admission is on the basis of CAT exam scores. IIM Ahmedabad organizes its own counseling round, which includes a group discussion round and Personal Interview. The selection process is pretty rigorous.
You need to log in to their site for the admission details and click on the apply for admissions icon. Be fast as the seats are limited and the standards are quite high.
See that you have the required cut off.
You can also check for an alternative which would give you equally good academics of good faculty and placements. Check on LPU ranked as number 2 in B-Schools with best placements. You can opt for provisional admission and check your seat in IIM because the refund policy would always give you your money back with minimum cut. You can similarly browse the details of academics in Symbiosis.

CAT 2020 Exam date November 29, 2020
CAT Exam date 2020 November 29, 2020
CAT Entrance exam sessions Conducted in 2 sessions – Morning & Afternoon on the same day
When to Check for CAT Notification 2020 On July 27-28, 2020
Maximum Age Limit to appear in IIM CAT No Age Limit, Graduates with 50% marks can apply
Number of Questions in CAT 2020 100 questions divided into 3 sections
The time duration of CAT 2020 3 hours
Sectional Time limit 1 hour for 1 section
Name of sections and number of questions VARC-34 Questions; DILR-32 questions; Quant-34 questions
The difficulty level of CAT 2020 Moderate to Difficult
Order of Sections Pre-fixed, no change allowed
Colleges Accepting CAT 2020 for MBA admission 20 IIMs, FMS, MDI, SPJIMR, IITs, IMI, JBIMS & 500 other MBA colleges in India
CAT 2020 Application Fee Rs.2000/-
How to Apply for CAT Application process is online only
IIMs' Application Fee No Separate Application Fee to apply for IIM. CAT Registration Fee covers application fee of all 20 IIMs

You should start 9 months before the exam, although this might vary from person to person. Consistency is the key. You must practice and learn each section daily from whenever you start till the date you appear for your CAT exam. Identify your weaker section and donate more time towards that particular section. On a minute level also focus on which topics you find difficult and take a call on how much time you want to spend on it depending on its weightage in the exam.
WAT or PI is not difficult but not preparing for the same can be fatal. Make sure that your preparation is up to the mark and you know everything about yourself. You will be asked to justify whatever you say and whatever would be there in your application form.
Just be consistent and enjoy this roller coaster ride. Give your 100% and try to think as less as possible about the result.