The interviewer was not in a good mood. I could tell he didn't want to hire anyone.

First, my interview was scheduled at 10 A.M. in the morning, but the interviewer called and told me to join at 10:30 A.M., then he himself joined around 11:00 A.M. Whatever questions he asked were too abstract; it was not clear what he wanted to ask.

Node.js dependency (not clear if he was asking about the dependency to run a project or the dependency to run Node.js itself)

React pattern (it was supposed to be the Reactor pattern)

Regular expression (asked to create a regex to match a given substring)