J.P. Morgan Quantitative Researcher interview questions

I was applied online , then about 1 week later, they send me a link for the online coding assessment which has to be done within one week. I did that in weekend. They test me two coding problems. After each coding problem, I was required to record a video to talk about my thought and any further improvement of my code

Video interview is a little bit stressful. A suit is a necessity for this. Before you answer each of question, you would have 30 seconds to prepare and 3 mins to answer the questions.