What is a key benefit of using virtual machines on a server?

Using virtual machines on a server allows for better resource allocation, which is a significant advantage. Virtual machines enable the consolidation of multiple workloads on a single physical server by partitioning hardware resources among different virtual instances. This means that CPU, memory, and storage can be dynamically allocated based on the needs of each virtual machine, leading to increased efficiency and utilization of the underlying hardware.

Additionally, better resource allocation helps in managing workloads effectively, as administrators can prioritize critical applications and adjust resources as needed without requiring additional physical hardware. This optimizes the overall operation of the server environment and can lead to cost savings in terms of hardware and energy consumption.

In contrast, options that suggest increased hardware costs, limitations of software testing, or reduced server uptime do not align with the primary advantages of virtualization, which fundamentally focuses on maximizing the utility of existing infrastructure rather than incurring additional costs or limitations.