Question

What item is at the front of the list after these statements are executed?

DequeInterface waitingLine= new LinkedDeque<>();

WaitingLine.addToFront("Jack");

WaitingLine.addToFront("Rudy");

WaitingLine.addToBack("Larry");

WaitingLine.addToBack("sam");

String name =waitingLine.getFront();

A.sam B. Larry. C. Rudy. D. Jack

Answer 1

C.Rudy.

Step-by-step explanation:

We are using Deque interface which is sub type of Queue interface. Deque supports insertion and deletion from both ends front and end.So it can be used as a queue and stack also.

In this question we have inserted Jack at the front first.Then Rudy at the front now we have Rudy at the front and all other elements are added to back.So Rudy is at the front.