CAT

Hi Manasvi,
First of all, you need to understand the syllabus:
This is a useful tip for almost any exam. Understand the syllabus by going through past years papers and official guidelines. CAT can be segmented into four broad parts-
Quantitative Ability
Data Interpretation
Logical Reasoning
Verbal Ability
The concepts used in this examination are broadly of class 10 level. However, the questions are little bit tricky to solve and require good amount of logical thinking. But it can be developed by practice.
Books and material
First of all, get CAT preparation material of some good coaching institute.
For Quant, there are two good books- Arun Sharma & Sarvesh Varma. You can refer to any of these. Go for the second book only when you have finished the entire syllabus.
No special book for concepts of Data Interpretation, Logical Reasoning and Verbal Ability. You can rely on the coaching material for all the concepts and can solve all the practice questions. However, you can refer to some books on these topics only after you finish the entire syllabus.
For verbal, you also need to read Word Power made Easy by Norman Lewis. It is a very good book which helps in increasing vocabulary not by memorising stuff, but by understanding the ideas behind the words. It is distributed into 45-47 sessions meant to be read one at a time. It is a must-read book and should be completed within two months of starting your preparation.
You also need to read a few good story books as explained in the next point.
Thats it. Yes, you do not need any other book for concepts. This much is enough.

Hi Abha,
The eligibility criteria for CAT 2017 is as following:
1. Applicants should hold a Bachelors Degree with minimum 50 per cent marks or equivalent CGPA awarded by a recognised university or educational institute as incorporated by an Act of the Parliament or State legislature in India or declared to be deemed as a University under Section 3 of the UGC Act, 1956, or possess an equivalent qualification recognized by the Ministry of HRD, Government of India.
2.For the reserved category candidates, such as Scheduled Caste (SC), Scheduled Tribe (ST) and Persons with Disability (PWD), the minimum percentage to be secured in Bachelors Degree is 45 per cent.
3. Candidates appearing for the final year of Bachelors degree/equivalent qualification examination and those who have completed degree requirements and are awaiting results are also eligible to apply. However, they will be given provisional admission only till the time they submit a certificate from the Principal / Registrar of their University/institution (issued on or before the date as stipulated by the respective IIM) stating that they have completed all the requirements for obtaining the Bachelors degree/equivalent qualification on the date of the issue of the certificate.
4. During the time of application, candidates need to fulfill any one of the following three conditions:
1. Completed Bachelors Degree with requisite percentage of marks
2. Completed Professional Degree with requisite percentage of marks
3. Should be in the final year of Bachelors Degree with requisite marks percentage
5. The calculation of the marks percentage will be done on the basis of the practice followed by the respective University/Institute. In case the Institute/University offers grades/CGPA, the conversion to percentage of marks would be based on the procedure as certified by the respective University/Institution. In case there is no such conversion scheme followed by the institute, the equivalence will be calculated by dividing the candidates CGPA by the maximum possible CGPA, and multiplying the result with 100.