If virtualization occurs at application level, OS level and hardware level, then such service in cloud is May 9, 2021 by admin Question: If virtualization occurs at application level, OS level and hardware level, then such service in cloud is A. IaaS B. SaaS C. PaaS D. no such service Answer» b. SaaS Note: The above multiple-choice question is for all general and Competitive Exams in India.