How to answer "tell me about yourself" or "tell me about a time you demonstrated leadership" without experience?

I am currently majoring in computer science and have recently begun applying for internships. A few interview questions I see that are common in general are "tell me about yourself" or "tell me about a time you demonstrated leadership," and I'm really not sure how I would answer these.

I chose to major in CS not out of a passion or even a particular interest, but rather because I didn't know what else to do and I figured the area I live in would have CS related jobs that could keep me financially stable while I figured out myself. I think that because of the lack of genuine interest, I didn't participate in anything CS (or even non CS) related outside of school, and even in school, I didn't join any CS clubs or the like; I just pretty much plodded along with my schoolwork, and the only CS projects I've done are the ones assigned in class.

As for leadership, maybe it's the way leadership or a leader is defined in my mind, but I dislike being a leader. Unless I'm with a group of friends, I shy away from leadership positions because I'm afraid of the extra responsibilities of managing people and the repercussions and/or alienation that might happen if I make a call and it fails. I'd think that I'm mostly fine with just working on things that are assigned to me.

With that in mind, how would I honestly yet positively answer these interview questions?

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