You haven't mention which exam you are giving.
But for every exam preparation, you must follow a strategy. Firstly, you need to make a daily routine which will contain all the subjects. For clearing the concepts, you must give online mock tests. More exams you will give, more you can clear your doubts. Having a clear conception is one of the keys to crack a exam. Also try to solve previous years papers to know more about the exam pattern. You can also make short notes or flashcards. That can help you to revise before the exam. Here, you can utilise the interent for making notes. Last but not the least, always try to be confident and motivated.

Hey there

Please mention the exam you are preparing for then only we can help you.

Feel free to ask

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Good luck