Class 11

Hello Shree,
Students who use their time well can crack the exam efficiently. Therefore, it depends upon your potential of studying and gaining from your study. Studying 10 hours a day with full concentration is enough to crack the exam.
All the Best.

Hello Niveen
In your class 12th exam question are only from 12th Syllabus but if you wants to score good in engineering entrance exam so covering 11th portion in necessary here are the few important topics which you can cover to score good marks
Mathematics
Conic Section, Andhra Pradesh&GP, Limits, Permutation & Combination
Physics
Gravitation, Sound Wave, Fluid Mechanism
Chemistry
Chemical Bonding, Thermodynamic, Equilibrium, Hydrogen, General Organic Chemistry, States of Matter.

There is no any restrictions in taking or choosing any course or subjects in class 11th. So, choose anything on your passion and focus on it. Enjoy and learn the subject carefully.

Hello,
Diploma courses are the short duration courses
They are basically:
Diploma courses after class 10th
Diploma courses after class 12th
Graduate Diploma Courses
Post Graduate Diploma Courses
You can make your career in Engineering field by doing short-term courses too.

You can change stream by writing application letter to principal, and try to change before half yearly or midterm exams.

If you are in 11th standard, this is the best time for you to start preparation.
You should take care of these points:
1. Join a coaching if needed.
2. Don't collect to much study material.
3. Find a mentor.
Best of luck.

Biomedical engineering would be a great choice.

You will only be able to join NIFT after completing 12th successfully and clear the entrance exam conducted by NIFT.