Question

in which of the following types of memory management technologies would a hypervisor install a driver inside the guest os that allows the hypervisor to take back some of the memory allocated to a vm so that it can re - allocate that memory to another vm or process?
hyperthreading
ballooning
bursting
flashing

Explanation:

To solve this, we analyze each option:

• Hyperthreading: Relates to CPU multitasking, not memory management for VMs.
• Ballooning: Is a memory management technique in virtualization where the hypervisor uses a driver in the guest OS to reclaim (take back) memory from the VM, allowing re - allocation to other VMs or processes. This matches the described scenario.
• Bursting: Typically about temporary resource (like memory) allocation beyond a base limit, not about reclaiming for re - allocation.
• Flashing: Usually related to firmware/software updates or visual signals, not memory management.

Answer:

Ballooning (the option with "Ballooning" text)