Me: So we've used Bootstrap for front-end and Django for ...
Teacher: Bootstrap is not a front-end framework.
Me: Uh..Okay. It's a CSS framework ? My bad.
Teacher: No, Python is for front-end.
Me: You mean templating ? Yeah! We've used Jinja templates.
Teacher: No. Use Python for front-end.

A DSA teacher who didn't write a simple line of code in class. No, not even the pseudo code. Teaches us A,B,C,.. in class and expects us to sing songs during the exam.