1)deadlock:
ex1) two teams fighting for playing volleyball in school premises,where one team1 own the ball and team2 own the net .team1 waiting until team2 leave the net and team2 waiting until team1 leave the ball.
2)starvation:
ex1)
Kid waiting for remote control when his parents watching the TV.In this scenario remote control always in the hans of parents.Kid has to wait for a longtime.
3)race
ex1)
in a hotel 45 tables are available and customers have to reserve them through phone calls, receptionists will answer the call,customer's whose call answerd first by receptionist will get a table,even though customer had tried the call earlier while receptionist on other call can't get the table.