Which is the toughest subject in VNIT nagpur?

I graduated from VNIT Nagpur a few years back. This story is from my 6th semester days. 

A friend of mine was appearing for his Math-II end-sem exam. He was giving his 3rd attempt at the time. His slots for that year were B, C, D, F, G, H. He had enrolled in 6 subjects. 

He was afraid that he would fail Math-II once again. However, this time he decided to try his best, and studied religiously. He just needed 20 marks to pass the exam, but the Mathematics faculty follows the binary-correction pattern. So he was sure that getting sufficient grades would be as challenging as before. 

Ultimately, he passed the Math-II exam. But having given the paper well filled him with so much confidence that he failed the remaining C, D, F, G, H slots. 

This is a funny tale, and we often laugh while reminiscing about it. But this answer is intended to warn you about Math-II. It was quite a difficult subject, especially for my friend. 

I completed my B.Tech ECE from VNIT Nagpur. 

For Electronics and Communication Engineering students, Device Modelling is the toughest subject. During sessional 1, we were shocked at the question paper of this subject. The language of questions seemed completely foreign. Same was the case during sessional 2. 

We prayed to God during the end sem, for this particular subject. Even after the exam was done, none could tell whether they would pass or not. Some of our classmates ended up with negative scores out of 100, as the final result. 

Pay extra attention to this subject, and try your best to clear the Device Modelling exam in the first attempt itself.