问题一我会说：
it depends.
i would not at the beginning, the student could learn more if they managed to figure it out by themselves.
but i would help them if they’re trapped in the rabbit hole, i also not prefer to tell them the right answer directly, would try my best to let the student to take the intiative to walk me through, usually they would realise the issue by themselves and i only need to be a good listner and provide minimum guidance.
举个例子说来说去，面试官可能都没抓到你的点。

问题二没必要谦虚：
I am pretty sure i am the right person for the job because blablabla
谈一下你自己对这个职位的理解，你过去的经历和能力如何跟这个职位匹配。如果对这个工作有更多超过职位描述的见解就更加分了。