Final answer:
Virtual memory allows for the execution of a process that may not be completely in memory, allows for larger programs than physical memory, and executes processes without being entirely in physical memory.
Step-by-step explanation:
Virtual memory allows for the execution of a process that may not be completely in memory. This means that parts of a program can be stored in secondary storage, such as a hard drive, and only the necessary portions are loaded into physical memory when needed.
Virtual memory also allows for a program to be larger than the physical memory. While the entire program may not fit into memory at once, the operating system manages the swapping of data between physical memory and secondary storage, allowing the program to run as if it were entirely in memory.
Lastly, virtual memory enables the execution of a process without it being entirely in physical memory. By using a combination of physical memory and secondary storage, the operating system can load and execute portions of a program as needed, improving overall performance and allowing for the execution of larger programs.