Here are the solutions to the questions: 13. What is the core role of an operating system (OS)? The core role of an operating system (OS) is to manage the computer's hardware and software resources and to provide a consistent interface for application programs to interact with the hardware. The correct option is B). B) To manage hardware resources and provide an interface between hardware and application software 14. How does server virtualization primarily reduce capital costs for an organization? Server virtualization allows multiple virtual machines (VMs) to run on a single physical server. This consolidation reduces the number of physical servers an organization needs to purchase, thereby directly lowering capital expenditure on hardware. The correct option is A). A) By enabling multiple virtual machines to run on a single physical server, reducing the need for additional hardware purchases 15. How does Software as a Service (SaaS) benefit a "Bring Your Own Device" (BYOD) policy? SaaS applications are typically accessed via a web browser over the internet, making them independent of the specific operating system or hardware of the user's device. This universal accessibility is highly beneficial for BYOD policies, as users can use their personal devices regardless of their platform. The correct option is E). E) By providing universal accessibility through web browsers across various hardware and operating system platforms 16. An organization conducting high level HIV-Aids research makes use of coordinated computers all over the world to perform data processing. All the computers interact with a central server that divides the computing tasks and assigns work to the computers. The organization is implementing This description perfectly matches Grid computing. Grid computing involves connecting geographically dispersed computers to work together on a common task, often for large-scale scientific or research problems, with tasks distributed and managed by a central system. The correct option is D). D) Grid computing