Chapter 3 - Operating Systems - Section 3.4 - Handling Competition Among Processes - Questions & Exercises - Page 159: 1

This system guarantees that the resource is not used by more than one process at a time; however, it dictates that the resource be allocated in a strictly alternating fashion. Once a process has used and relinquished the resource, it must wait for the other process to use the resource before the original process can access it again. This is true even if the first process needs the resource right away and the other process will not need it for some time.

This system guarantees that the resource is not used by more than one process at a time; however, it dictates that the resource be allocated in a strictly alternating fashion. Once a process has used and relinquished the resource, it must wait for the other process to use the resource before the original process can access it again. This is true even if the first process needs the resource right away and the other process will not need it for some time.