The first round is the HR round, which is just basic talk. The HR personnel will be great and will help you out in whatever way they can. Then, a CollabEdit round will be set up, and they will use BlueJeans for scheduling the meeting. All of this is fine and nothing to worry about.

The question given to me was absurdly easy. I don't even know why such an easy question was asked to someone with so much experience. The interviewer had a sheet with a question provided by HR. He explained it to me and started discussing.

Find a number in a sorted array and then find the number in an unsorted array.

They will unsort the array on their own.