__________ is used to shift processes so they are contiguous and all free memory is in one block. a. Fragmentation b. Compaction c. External Fragmentation d. Division

Direct Memory Access (DMA) is a technology that makes the system more concurrent. How does it work? How much does this complicate the process of developing new pieces of hardware?

What is the purpose of having cache memory if RAM (Random Access Memory) is based on transistors? Is it even possible to run every program on the same kind of computer memory?

With virtual memory, when a program requests memory,the memory management system does which of the following? Select one: A. It grants the request as long as there is enough physical memory to accommodate B. It looks up the address in the page table. If the address is in memory, then it grants the request. C. It looks up the address in the page table. If the address is in memory, it grants the request. If the address is stored to disk, it writes a section of memory to disk and then transfers the requested virtual memory address from disk to main memory. D. It causes a deadlock to occur.