WHAT IS JEE (MAINS + ADV)?

JEE MAINS = STATE COLLEGES & NIT'S

JEE ADVANCE = (40% XII SCORE + 60% JEE-MAINS SCORE)=IIT'S

The successor to the JEE and AIEEE - for long the gateways to India's top engineering colleges including the IITs - will be called ISEET OR JEE joint Engg. Entrance the Indian Science Engineering Eligibility Test. 
As reported by The Indian Express on January 31, the new, SAT-style exam comes into force in 2013. It will do away with multiple entrance examinations and reduce the stress levels of students. ISEET will have two parts, Main and Advance, each of three hours duration. Both tests will be given on the different dates. ISEET MAINS 2013 will be held in either March or April. 
ISEET Main will be an objective type exam, and will test comprehension, critical thinking and logical reasoning type is proposed. ISEET Advance will test problem-solving ability in basic science (PCM) subjects. The two tests together will indicate a candidate's scholastic level and aptitude for science and engineering. 
A student's performance in the Class 12 Board exam will be considered, with a weightage not be less than 50 percent of the total score. Out of which Top 20percent will be eligible for Advance Test for IIT & NIT's. The combined weightage for ISEET-JEE Main and Advance will not be more than 50 percent; however, the weightage given to Board scores can go up to 100 percent. Each state government or institute will be able to decide the specific weight it gives to Board, Main and Advance exam scores. A committee headed by Dr T Ramasami, secretary in the Department of Science & Technology, has demonstrated with the help of the Indian Statistical Institute that school scores across various Boards can be normalized through a statistical process. 
ISEET-JEE will be conducted by IIT . Further modalities will be worked out by an academic group headed by the director of IIT, Kanpur.

JEE Pattern, JEE-MAINS = NIT's (Joint Entrance Exam)

In this IT Kanpur is going to conduct two type of exams. 
1. Mains (Similar to AIEEE)
2. Advanced Test (Questions as per IIT Pattern like . . .

•  Objectives with single correct answer, Objectives with Multiple correct answer, Assertion & Reasons, Match the Pairs 
•  Integer type question, Comprehension (Paragraph type), Subjective type etc. etc...
•  Be prepared your 30% score will get you to NIT's and IIT's for a good branch and good colleges.
•  Even your XII Class score will be considered for the above exams. Proposed will be around 50%.
•  Mains exam score is going to decide whether you are eligible for advanced test or not.