How hard is it to get As in first year?

As an incoming first year HSCI student, I wanted some input from current first years and upper years as well. Is it truly really hard to get an A mark in your courses as a first year?

I've heard some people say it depends on the prof heavily... is that true? What about for courses like bisc, math, and chem?

And btw I don't mean a perfect A+... just anything that qualifies as an A lol

Anyone can reply!!!