Is this applicable for for 45% marks above in gratuation....?

Hey, but as per all the reputated and good universities ask for minimum of 50-55% for the entrance exams and admission. and if you don't score that much you will have to search for private institute which cost you higher and still not recognized.

It depends on the kind of course you want to enter. For some courses required %age is 45 but there courses the requirement is more like 55% or 60%.

Qestion is not specific.

IT IS GOOD IF YOU WRITE AN IMPROVEMENT EXAM AND TRY FOR 50%.IT IS ALWAYS TO CROSS THE LEVEL AND ACQUIRE A MINIMUM SECOND CLASS.