Negative questions, in my experience, are fairly common in everyday speach. The questions themselves are easily understood, but not the responses.
Ĉu vi ne faris viajn hejmtaskojn?
Jes / Ne
If I finished my homework, should I use jes or ne? Logically ne should place a second negation to the phrase and therefore make it a positive statement. However, in my native native language (Swedish) I'd say no if I didn't to the homework. Maybe this is why I am confused.
Here are examples of similar questions:
Ĉu vi neniam faris viajn hejmtaskojn?
Ĉu vi faris neniujn el viaj hejmtaskoj?