On the Internet, you can find many memory defragmentation programs by Googling "RAM defragmentation" or "RAM defrag" etc. Some claim to be able to do RAM level memory defragmentation, and they all claim to increase system efficiency and stability. Assume that all these programs are running as applications. Based on the principles of paging memory management systems, answer the following questions.
1. Briefly explain how a paging memory management system works. Please include the following in your explanation:
- What logical memory addresses are, what physical memory addresses are, and also the relation between them?
- What level of memory, logical or physical, does the process image of an application occupy?
- What type of memory addresses, logical or physical, does the physical processor (or CPU) operate on?
2. Does a paging memory management system have the fragmentation problem at the physical memory (RAM) level? Why or why not. Does a paging memory management system have the fragmentation problem at process image level? Why or why not.
3. Can an application running on an operating system, which uses a paging memory management system, directly access the physical memory and also change the physical memory allocation to processes? Why or why not.
4 Write down your conclusion about the effectiveness and usefulness of memory defragmentation applications. Your conclusion should logically follow the argument line of the answers to the previous questions.