JEE

IIT is the dream of many candidates who left behind everything to make their dream true and a little mistake and lack of proper guidance give a bitter taste to the candidate result.
Here are the few common mistakes that a candidate do during their preparation:-
1. Never underestimate NCERT e.g.; in 2016 3 questions asked from Biomolecules chapter 14 from chemistry 12th and true line is mentioned in NCERT book.
2. Never try to collect a lot of books if you want to refer only one side book because going through the different book may confuse you.
3. Try to miss less classes no matter where you are studying because may be a class which you missed.
4. Don't spend too much time on the social network.
5. Try to avoid foreign writer book such as Irodov, Resnick and Walker series because in many cases you may get confused instead of learning.
7. Never compare yourself with the weak student and be in touch with a good student.
8. Don't worry about future just go with your preparation and be ready to face anything.
9. Don't use a calculator during maths calculation because it may decrease your speed.
10. Never lose hope and believe in yourself.
I hope these highlights of common mistakes will help you to solve and score good marks.

The crux of all the major engineering entrance exam that a student prepared or is essentially the same. They all focus on concepts of physics, chemistry and maths. The difference is only in the level of difficulty.
JEE is definitely the highest and the toughest when it comes to the level of difficulty and it tests you on applying multiple concepts in a single question. In addition to that, it also tests your endurance as an engineering aspirant. If one prepared for an exam like JEE, one can be rest assured that all the parameters of your preparation are being covered as JEE is the most exhaustive among the entrance tests.
So, one does not need to prepare separately for VITEEE as your fundamental preparation is already done. What one can do additionally is:
1. Go through past year papers of VITEEE to see the level of difficulty.
2. Take times mock sets for VITEEE. This is important because, in easier entrance exams, time management becomes a matter of paramount importance as the cut-off is higher. So, you need to answer more questions with higher accuracy.
Apart from this, no additional or separate preparation is needed.

No, you don't need to prepare for MUOET separately if you are preparing for JEE exam. MUOET paper is quite easy as compared to JEE paper. You just have to solve mock papers of MUOET to get an idea of paper pattern and quality as well as the quantity of questions asked.
Syllabus of both the exams is almost similar. Physics, chemistry and mathematics are common in both the exams. But MUOET asks few questions of English and aptitude.
Again, the level of aptitude and English is not too high, you can easily prepare for it in one or two months before the examination. You can take a lot of mock papers to boost your confidence.
NCERT is enough for chemistry and for physics part, you may prefer HC Verma. You may refer RD Sharma MCQ for maths.
MUOET is not that hard nut to crack, so even if you have prepared/finished 50% syllabus of JEE then you can easily crack it. So don't worry about MUOET and prepare for JEE with full confidence and determination.
Hope it helped.