Final answer:
The problem with the global replacement algorithm is that a process cannot control its own page-fault rate.
Step-by-step explanation:
The subject of the question is Computers and Technology and the grade level is High School.
The problem with the global replacement algorithm is that a process cannot control its own page - fault rate. This means that a process cannot determine or influence the rate at which its pages are being replaced by the operating system. The decision of which page to replace is made by the operating system based on certain criteria, such as the page's age or access history.
For example, let's say a process has allocated a certain number of frames, and when a page fault occurs, the operating system decides to replace one of the process's pages. The process itself has no control over this decision and cannot influence the page replacement algorithm.