Final answer:
The operating system is responsible for virtual memory allocation that uses page frames in main memory and disk block buffers, allowing larger or multiple programs to run simultaneously.
Step-by-step explanation:
The operating system provides a virtual memory capability that allocates page frames in main memory to processes and also allocates page frames to disk block buffers. Virtual memory allows an operating system to use hard disk space to simulate extra memory.
This can enable a computer to handle larger programs or multiple programs simultaneously. The operating system's memory manager is responsible for this function, using concepts like paging, where a page is a fixed-length contiguous block of virtual memory.
Pagination involves moving data between the disk and the main memory, making programs believe they have access to a larger amount of memory than is physically present.
The operating system provides a virtual memory capability that allocates page frames in main memory to processes and also allocates page frames to disk block buffers.
Virtual memory allows the operating system to organize memory in a way that makes it appear that each process has its own dedicated memory space, even though the physical memory is shared among multiple processes.