Answer: Queuing systems
Explanation:
We have the queuing theory which gives us the in depth knowledge of queuing systems which helps us to predict the queue length and the waiting time at the respective nodes in an network. A group of queuing systems together constitute the queuing network. The queuing theory helps to cope with the demand of various services in an queuing network composed of queuing systems.
SELECT TO_CHAR (Tutor Report.Month, 'MONTH') MONTH, Tutor Report.MatchID, Match History.MatchID, MatchHistory.Tutor.ID FROM Tutor Report, MatchID WHERE <span>Tutor Report.MatchID=Match History.MatchID AND NOT (TutorReport.Month=‘JULY’);</span>
Answer: d
Explanation; Hopes this helps!!