GMAT

The GMAT (Graduate Management Admission Test) is a 3-hour standardized exam designed to predict how test takers will perform academically in MBA (Masters in Business Administration) programs. GMAT scores are used by graduate business schools to make admission decisions.
MBA Entrance Exams in India:
CAT (Common Admission Test)
Common Admission Test (CAT), the Guru of all MBA entrance examinations is conducted by the Indian Institutes of Management (IIMs) to enroll students for Post-graduate and Fellow Programs. Several other top management institutes all over India also use valid CAT score for admissions. CAT is held in the month of November.
XAT (Xaviers Admission Test)
XAT (Xaviers Aptitude Test) is conducted for admission to Post-Graduate degree programme in Management at XLRI, XIM, XISS, LIBA etc. XAT is held in the month of January.
NMAT by GMAC (Narsee Monjee Admission Test by GMAC)
The NMAT by GMAC exam is used for admissions to some of the leading graduate business programmes in India. Since becoming a computer based test in 2009, the NMAT by GMAC has been a valid and reliable predictor of success in graduate business school.Institutes accepting NMAT Score: NMIMS University (Mumbai, Bangalore, Hyderabad); Alliance University (Bangalore); Amity University (Delhi NCR); and 15 other colleges.
IIFT (Indian Institute of Foreign Trade)
Indian Institute of Foreign trade (IIFT) exam is conducted for admission to Post-Graduate degree programme in Management with special focus on International Business. Institutes accepting IIFT Exam Score: IIFT Delhi and IIFT Kolkata.
SNAP (Symbiosis National Aptitude Test)
Symbiosis National Aptitude (SNAP) Test is a common written test for the admission processes of all Symbiosis autonomous postgraduate institutes.
Hope this helps.

Dear Shivani,
First, you need to understand why candidates appear for GMAT exam.
It is not necessary to have work experience to take the GMAT exam because GMAT is taken majorly by MBA applicants, the percentage of candidates having work experience is high.If you are planning for MBA abroad, then yes, work experience is required for a number of reasons -
Accredited universities do not accept fresher.
If you are a fresher your profile must be strong enough to compete with your peers who would comprise mostly of managers, executives, etc.
MBA is all about knowledge sharing, and relating to real life experiences. It is not about memorizing data from books, therefore without work experience, you won't be deemed as a suitable candidate.
Best wishes.