An administrator is building a large virtual machine that will require as many vCPUs as the host can support. An ESXi 6.x host has these specifications:
Four 24-core Intel Xeon Processors
256 GB of Memory
512 GB Local disk space using VMFS5
What is the maximum number of virtual CPUs that the virtual machine can be allocated?
A. 64
B. 96
C. 128
D. 192
The maximum number of virtual CPUs that you can assign to a virtual machine is 128. The number of virtual CPUs depends on the number of logical CPUs on the host, and the type of guest operating system that is installed on the virtual machine.
Be aware of the following limitations:
A virtual machine cannot have more virtual CPUs than the number of logical cores on the host. The number of logical cores is equal to the number of physical cores if hyperthreading is disabled or two times that number if hyperthreading is enabled.
Not every guest operating system supports Virtual SMP, and guest operating systems that support this functionality might support fewer processors than are available on the host. For information about Virtual SMP support, see the VMware Compatibility Guide at http://www.vmware.com/resources/compatibility.
Hyperthreaded hosts might affect virtual machine performance, depending on the workload. The best practice is to test your workload to determine whether to enable or disable hyperthreading on your hosts
I think “C” is correct because question states about XEON processor. So at official Intel site we see what Hyper-Threading available in XEON family:
“Intel® HT Technology is available on the latest Intel® Core™ vPro™ processors, the Intel® Core™ processor family, the Intel® Core™ M processor family, and the Intel® Xeon® processor family. ”
https://www.intel.com/content/www/us/en/architecture-and-technology/hyper-threading/hyper-threading-technology.html