Q11. A queue is modeled on a ____ structure. a. LIFO b. FIFO c. stack d. list Q12. A queue can only be stored as a linked list. a. true b. false Q13. Whenever an application is modeled on a FIFO structure, ____ are used. a. lists b. queues c. stacks d. arrays Q14. A queue is a last in first out data structure. a. true b. false Q15. A technique in which one system models the behavior of another system is called simulation. a. true b. false Q16. In a priority queue, customers or jobs with higher priority are pushed to the back of the queue. a. true b. false Q17. Queue can be derived from the class ____. a. LinkedListClass b. stack c. list d. array Q18. The addQueue method properly inserts an element to the queue and increments the variable count by one. a. true b. false Q19. In a queuing system, the term server refers to the object that provides the service. a. true b. false Q20. In a queuing system, the time it takes to serve a customer is referred to as the waiting time. a. true b. false