I want to know how the question paper is set for GATE. I want a specific answer which should clear following points, 1. What is the motive behind selecting the questions. Which quality of the student is being checked memory, concepts or aptitude. 2. What is the the criteria behind choosing weightage of different subjects. 3. Is there any specific percentage for numerical answer type questions. 4. Is the difficulty level of different set of question papers for the same branch is maintained same. If yes then how. 5. What is the motive behind introducing virtual calculator.