Question

After performing these set of operations, what does the final list look contain? InsertFront(11);
InsertFront(22);
InsertRear(33);
DeleteFront();
InsertRear(44)
InsertRear(11);
DeleteRear();
InsertRear(55);
display();
​

Answer 1

After performing these set of operations, the final list look contains:(11,33,44,55)

• InsertFront adds a number in front of the list and InsertRear adds a number at the end of the list.
• DeleteFront deletes a number in front of the list and DeleteRear deletes a number at the end of the list.
• According to the sequence of the function and resulting dequeue are as follows :

1. InsertFront(11);  ⇒  11
2. InsertFront(22); ⇒  22,11
3. InsertRear(33);  ⇒   22,11,33
4. DeleteFront();    ⇒   11,33
5. InsertRear(44);   ⇒   11,33,44
6. InsertRear(11);     ⇒  11,33,44,11
7. DeleteRear();     ⇒   11,33,44
8. InsertRear(55);   ⇒  11,33,44,55
9. display();             ⇒  11,33,44,55

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