Google is an example of a(n):
a. web site.
b. search engine.
c. search directory.
d. subject directory.

Google is an example of B, A search engine

I’d say platform as a service (paas) or application platform as a service (apaas) or platform base service is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.