Does Google App Engine use any hypervisor?

Question

Since Google App Engine is a PaaS does it use any hypervisor? it is known that Amazon EC2 uses XEN and Microsoft Azure uses Hyper-V.

Answer 1

EC2 is Infrastructure as a Service, and provides low level access to the hardware; thus, the choice of hypervisor is relevant. MS's Azure also provides reasonably low level access. App Engine is structured around the Google stack; it doesn't provide access to kernel level services, so the choice of (or existence of) hypervisor isn't relevant.