Which cloud “As a Service” model is a software distribution model in which a third-party provider hosts applications and makes them available to customers over the Internet?

(A) Software as a Service
(B) Platform as a Service
(C) Infrastructure as a Service
(D) Database as a Service

Software as a Service is the correct answer.

SaaS platforms make software available to users over the internet, usually for a monthly subscription fee. With SaaS, you don’t need to install and run software applications on your computer (or any computer). Everything is available over the internet when you log in to your account online. You can usually access the software from any device, anytime (as long as there is an internet connection). SaaS examples: Google Apps, Salesforce, Dropbox, Slack.