How do I know everything?

Computer Science major here,
It seems like everyone in my class knows everything already,
And they quickly absorb all new information.

How do I become like this?

>>1
Two possibilities, in order of decreasing likelihood, along with my humble advice:
1. Everyone is at least +1 standard deviation IQ smarter than you.  If so, change your major to business ASAP.
2. You are so far behind because you are not a nerd / party too much / whatever.  If so, use stimulants and study harder.

Have a nice day!