As you want to know the value of Common Admission Test (CAT) exam given below:

Common Admission Test (CAT)

The Common Admission Test (CAT) is an all-India test conducted by the Indian Institutes of Management (IIMs) as an entrance exam

It provides admission to the Post-graduate and Fellow Programs in management courses of several management institutes all over India including the IIMs.

The CAT score is used unconnectedly by each institute along with other parameters i.e. Academic performance
Work Experience
Group discussion
Written assessment
And interview performance etc. to select candidates.

Exam Format

CAT is a computer based test, conducted in multiple cities.
Candidate can select his test date and slot as per choice and availability.

Top Colleges Under CAT

There are at present 19 IIMs.
Other prominent B- Schools (not in any particular order) that accept CAT scores are:

S.P. Jain Institute of Management Research
IMT Ghaziabad
NITIE K. J. Somaiya Institute Of Management Studies And Research
Faculty of Management Studies (FMS) Delhi
MICA Ahmedabad
MDI Gurgaon
SJMSOM (IIT-Bombay)
VGSOM (IIT Kharagpur)
Department of Management Studies (NIT Trichy)
DMS (IIT-Delhi)
TAPMI
IMI Delhi
XIM-B