# Explain the concept of a circular queue and its applications.

Explain the concept of a circular queue and its applications. The following diagram shows the basic components for a queue, which is composed of an inner queue and an outer queue. The first button is used for reading from the inner queue and the second button for writing to the outer queue. Figures 8-21 show the basic components for a circular queue. Figures 8-22 depicts how the concept of a circular queue works with its applications. Work Order The following diagram shows an example for a Work Order. Figures 8-23 are examples of different types of Work Orders. For each type, the description of the queue type is shown. These types of Queues can be set using the following three methods. Use of the Iterator Keep the order of the element. Iterate to the second iteration of the Iterator Iterate to the first iteration on the first element of the List. As shown in Figure 8-24, it is possible to implement iterating to the second iteration. The fourth method of keeping the order of the elements is shown in Figure 8-25. It may be, however, more useful to keep the order of the items. Therefore, if the queue reaches the first element of the queue an infinite loop can be built and the items are in the end of the list. In that case all elements have a limit. Figures 8-26 and Table 8-5 show iterating to the second iteration. One method of iterating to the third iteration is shown in Figure 8-27. There are also three ways of remaining the order of the items in the queue. The description of the queue type is shown.