Huge advice for a junior right here. Juniors lie - a lot. They're afraid that not knowing something is bad.

OP, don't lie. Admit when you don't know something. You counter this by being inquisitive. If they ask if you know something but don't ask them what it is. Is it like this other thing? How do they use it? That's how you win the interview. No one knows everything, but they want someone who can learn.

Also, completely separate, don't make jokes. That's just personal advice, but I made jokes when I was younger. They don't land, it's not the place.