hi,

see MAT is usually conducted 4 times in a year in February, May, September and December. the eligibility criteria is candidates must have completed graduation in any discipline from a recognized education board. A final year student in any undergraduate (i.e. B.A, B.Sc., B.Com., B.Tech., etc) can also appear provisionally. topics in mat exams are Language Comprehension, Mathematical Skills, Data Analysis & Sufficiency, Intelligence & Critical Reasoning and Indian & Global Environment. Composite score is calculated  basis of performance in the first four sections which include Language Comprehension, Mathematical Skills, Data Analysis & Sufficiency and Intelligence & Critical Reasoning. however if you are confident on your performance and expecting a decent results then you need not to appear in the mat next session exam.

hope you may understand.