I didn't remember all the scenarios for the memory leaks, but I saw someone was asked about it, so I googled it, and in the interview I steer the conversation just to trick me into asking this one. (I put something like, "oh in this case, there might be risk of memory leak" in some answers), And they took the bait! So thank god they didn't hire me at the end right? they dodged a bullet by some cunning dude like me.