The process took around 2 weeks. No personality at all during the whole process, putting away all kind of humanity and just calling, doing questions, hanging (no "how are you?" no "well, I am X, I work here at Booking and we do X, bla bla"). The questions were vague, ambiguos ("what happens since you type Booking.com until you see the page?") and without any kind of plan, jumping from one topic to another based on my answer, etc. It looked like a lack of planning. Coding questions are easy but the fact of having people looking at your code in realtime can make you pass through a bad moment.