Apart from technical knowledge, questions will be asked from General science, General Awareness, Arithmetic, General Intelligence and reasoning, Let me help u in a small way for your last minute preparation.
General awareness: In General Awareness,almost half the questions will be from current affairs. So you should be through with latest polity, economics ,Sports ,Persons in power,Science and technology news ,Awards and prizes, Latest Books and Authors and International news. I have worked really hard for last two days to collect all the above things. So click on that links. Finally test your knowledge through two mock tests: Test 1 and Test 2.
General science: How to study general science and important topics is given in this link. After studying you can test yourself in this mock test.(too be available soon)
Arithmetic, General Intelligence and reasoning: Refer R.S. Agarwal Quants book and verbal and non-verbal reasoning by R.S. Agarwal. It is more than enough.
Technical knowledge: It depends upon your stream. No broad advice can be given. However just prepare basics (up to 2nd year of engineering).