What? I don't fully understand what happened here. He was currently using the knowledge of a Korean bodyguard, and he previously had just used the knowledge of a US bodyguard. Was he asked terms that were in English? I can't tell because of the translation.
And why couldn't he just say that he doesn't understand English terms? I mean, is that highly frowned upon in the South Korean bodyguard field? I could understand if the answer is yes, but I just don't know if that's true or not. Was the written exam in English, and now he's being asked English too, so it would look weird if he said he didn't understand English? Does his memories of the exact same questions from the test just evaporate after the timer runs out? He couldn't answer any of the questions?