At an interview, the first round was an online coding round. Two questions, one easy one hard, 90 minutes, easy peasy.

I solved the hard one first.
A bit of good logic, followed MVC pattern, all done. Worked flawlessly.
Submitted code. Online compiler threw up an internal error citing java is an invalid command(jdk not found).
Called the invigilators. What I heard next, I couldn't believe this shit.
"We're not responsible for any errors you may be having. Figure it out yourself"
I was like WTF dude. This is not even a compilation or runtime error!
After a heated discussion, I made him look at the code.
Him - what is all this classes and all? Why haven't you written everything inside the main function?
Me - those are model classes. Those are different helper functions. That is a recursive function to avoid 5 for loops and use divide and conquer. Ever heard of OOP? what kind of person writes a 300 line program inside one function?
Him - no no we write it like that only. Correct this.
Me - I fit everything inside the main function. Still the same error, java not installed. Called the idiot to have a look at it.
Him - yeah your code is wrong.
Me - may I know what's wrong with it? Can you fix it please?
Him - no no we aren't allowed to see the code (he had already read it twice. It was compiling and running perfectly, locally) .
Yeah you solved only 1 problem, you were supposed to solve 2.
Me - yes because the rest of the time I had the pleasure of your company. (It isn't everyday that I see talking buffoons.)