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

question 51

Multiple Choice

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) ;
-What value is returned by the last dequeue operation (denoted above with a d3 in comments) ?

• A) 3
• B) 5
• C) 9
• D) 2
• E) 4

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