Which memory allocation technique allows physical memory to be reclaimed from virtual machine A and redistributed to virtual machine B, possibly forcing virtual machine A to swap internally?

Which memory allocation technique allows physical memory to be reclaimed from virtual machine A and redistributed to virtual machine B, possibly forcing virtual machine A to swap internally? 






A. Transparent Page Sharing
B. Memory Balloon Driver
C. VMkernel Swap
D. RAM Overcommit







Answer: B


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