Hello Mohan, Common Entrance Test or commonly known as CAT is online entrance exam or gateway to get admission in IIMs for MBA programme. Ever year 100+ B school participate in this examination and gives admission to the student in order to build their career. 

Eligibility for CAT

A candidate must hold a bachelor degree with minimum percentage of 50% for general category and 45% for SC, ST and other category with the recognized university. A candidate will appearing on final year are also eligible to take part of this examination. There is not any maximum age limit for this examination however the candidate must across the age limit of 20 year to sit in this exam. 

SYLLABUS OF CAT

CAT examination is split into three parts namely quantitaive aptitude consists of 34 questions, data interpretation & logical reasoning of 32 questions and verbal ability and reading comprehension of 34 questions of 60 minutes in each sections. 

BOOKS FOR CAT EXAM

NCERT Mathematics books 6-10

Quantitative Aptitude BY Arun Sharma

Quantitative Aptitude by Abhijit Guha

Quantitative Aptitude by Nishit SINHA

Verbal Ability BY Arun Sharma and Meenakshi UPDHYAY

Verbala nd comprehensive aptitute by Nishit Sinha

Word Power Made Easy BY Norman Lewis

High School Grammar And Composition By Wren And Martin

 A Modern Approach To Logical Reasoning by R S Aggarwal

How To Prepare Logical Reasoning by Arun Sharma

Data Interpretation For CAT by Arun Sharma

All you need to do a planned and concentric study to crack this examination. By dividing your syllabus according to time table and go through a deep and conpetual study leads you to crack this exam.

hope this will helps you

good luck