Should I be perfect in all tags without missing anyone of them?

Question

Should I be perfect in all tags without missing anyone of them?
there are some non important tags I need to skip to and learn them when I need.

Answer 1

It's always OK to come back to refer when you need to use it.

Unless when you're in the middle of an exam ofc.

Answer 2

yes , you can

Answer 3

https://code.sololearn.com/WBqdtKvyXGzc/?ref=app