Solution: The separation of user logical memory and physical memory is called virtual memory. Only part of the program needs to be in memory for execution.

Solution: The statement is true. Since, a part of the program needs to be in memory for the process of execution, the logical space can therefore be much larger than the physical address space.

Solution: Demand paging can implement virtual memory. Another way is demand segmentation.

Solution: COW stands for Copy over write. COW allows both parent and child processes to share the same pages initially.

Solution: LRU stands for Least Recently used. LRU is least recently used. It replaces page with the smallest count.

Solution: Priority allocation uses a proportional allocation scheme using priorities rather than size.

Solution: Global replacement process selects a replacement frame from the set of all frames; one process can take a frame from another.

Solution: It is called as internal fragmentation. Main memory use is inefficient. Any program, no matter how small, occupies an entire partition. This is called internal fragmentation.

Solution: Thrashing is the term used whenever a process is busy swapping pages in and put.

Solution: Slab is one or more physically contiguous pages. Cache consists of one or more slabs.