Is it correct to compose answers when preparing for exams?

Question

IT education

Hello. I was going to enroll in a master's program in mathematics and computer science (not my profile for a bachelor). They gave a list of questions, if you study day and night, then you can prepare. Those. I am compiling a file with answers for myself in order to systematically read, understand, and learn everything. The question is this:
Are there any forums / services for advising on such issues (albeit for a fee) to check the correctness and sufficiency of the answers to the exam questions?
Maybe a bit of a confusing question, I apologize in advance for this and thanks for the answers.

Answer 1

In addition to what Denis Ineshin has already answered you , I can add this ...
If you really need to understand before the exam whether you are preparing correctly, whether you have prepared the correct answers to the questions, it would be good for you to look around, you never know, maybe you There is a friend who understands a number of issues. If there is no such acquaintance, then you can try your luck and post questions that are controversial for you here on the toaster.
But, I would not advise you to use various paid services.
Moreover, you can figure everything out on your own - this has already been checked!
I hope my answer will be useful to you.
¡Saludos!

Answer 2

The exam will check the correctness. You need to teach to the point where you yourself begin to understand the subject matter and can speak freely about it. Note that it is to understand, and not to make an effort to remember mindlessly what it was about. If there is an understanding, then the details themselves will pop up in memory along the chain and everything will go smoothly.