CAT (IIM), the mother of all MBA Entrances is a computer based online test with 3 distinct sections - Verbal Ability and Reading Comprehension (34 Questions), Data Interpretation and Logical Reasoning (32 Questions) and Quantitative Ability (34 Questions)  - each of one hour duration and with a marking scheme of (+1, -1/4). Based on CAT percentile score, candidates are called for Group Discussion, Essay and Personal Interview for final selections. 

XAT (XLRI) Entrance has 2 papers - Paper I with 78 objective questions with 5 choices on Quantitative Ability (26), English Language & Logical Reasoning (23) and Decision Making (29) to be answered in 170 minutes and Paper II for 35 mnutes with GK (25 MCQs) and a subjective Essay paper.  You can download the previous year papers in the study area. The Marking scheme is (+1,-1/4), but more than 13 unanswered questions will attract a negative mark of -0.05 each.

IIFT Entrance examination is of 2 hours duration with MCQs from English Comprehension, Logical Reasoning, Quantitative Analysis, General Knowledge & Awareness. The candidates shortlisted on the basis of their scores will be called for Group Discussion, Interview and Essay Writing for final selection. 

AIMA-MAT is a 2½ hour test with 200 MCQs in five papers - Language Comprehension, Mathematical Skills, Data Analysis, Intelligence & Critical Reasoning and Indian & Global Environment Section, with 40 questions in each paper.  One can choose between offline or Computer based Online  test modes. The marking scheme is (+1, -1/4)

SNAP (Symbiosis National Aptitude Test) is again an objective test of 2 hours duration with each MCQs from General English, Quantitative Aptitude, General Awareness, Logical & Analytical Reasoning. Each question has 4 responses and a marking scheme of (+1, -1/4). Candidates shortlisted based on the SNAP score are called for Group Discussions and further shortlisted ones called for Personal Interviews before final selections.