For the questions below, consider the following operations on a Queue data structure that stores int values.
Queue q = new Queue( );
q.enqueue(3);
q.enqueue(5);
q.enqueue(9);
System.out.println(q.dequeue( )); // d1
q.enqueue(2);
q.enqueue(4);
System.out.println(q.dequeue( )); // d2
System.out.println(q.dequeue( )); // d3
q.enqueue(1);
q.enqueue(8);
-After the code above executes, how many elements would remain in q?
A) 0
B) 4
C) 5
D) 6
E) 7

Question

Quizplus · Accepted Answer

B) The constructor creates an initially empty Queue. Each enqueue operation adds one int to the Queue and each dequeue operation removes one int from the Queue. There are 7 enqueue operations and 3 dequeue operations, leaving 4 int values in q at the end.

For the Questions Below, Consider the Following Operations on a Queue