Yes, you can start your preparation in your second year.
You should also read english newspaper you will become aware of the daily current affairs. Simultaneously, your vocabulary and reading speed will also improve. Try to solve as much as mock test series for your practice.
All the Best for your Preparation!!
Candidates can check B.Tech Cut off for Top IITs & NITs here.
Admit Card | Eligibility | Application | Selection Process | Preparation Tips | Result | Answer Key
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile