Does ActiveResService mean that it loads the already booked tickets ?
Does WaitingReservation mean people who are currently blocked the seats.
Can we use RabbitMQ or some message queues for the above services instead of HashMap ?
In one of the interviews I was asked a question about Designing Flight Runway where In a minute a certain flights could be landed, if limit exceeds we should not allow other flights ?
I asnwered about using HashMap and the interviewer was not convinced.