In data structures module, here is a question.

Show the contents of the array, and the position of the front and rear, after each instruction. In the case of a dequeue instruction, say what is returned. Also say if theres an error.

We implement a queue inside an array of size 6 in circular fashion. Let [ and ] indicate the front and rear of the queue respectively, taken mod 6. To start, our queue is empty and the front and rear are at position 0. (13,5,4,6,7,2 The following instructions are executed in sequence. enqueue 7 enqueue 1 enqueue 3 dequeue dequeue enqueue 5 enqueue 8 dequeue dequeue enqueue 4 dequeue enqueue 2 dequeue dequeue dequeue