Introduction - If you have any usage issues, please Google them yourself
One of the useful properties of the circular buffer is: when a data element is used up, the rest of the data elements without moving the storage location. On the contrary, a non circular buffer (e.g. a common queue) in a data element, the data elements need to move before. In other words the circular buffer, for the realization of a FIFO buffer, instead of circular buffer for LIFO buffer.