Final answer:
The size of a process is limited by the size of physical memory, with techniques like swapping and paging used to handle larger processes.
Step-by-step explanation:
The size of a process in a computer system is limited by the size of physical memory. The physical memory, also known as RAM (Random Access Memory), is the main memory of a computer that is directly accessible by the CPU. The physical memory holds the instructions and data that the CPU is currently processing. While processes can use virtual memory management techniques to use secondary storage (such as hard disks or SSDs) to simulate more memory than is physically available, the actual size of the process when it is loaded for execution is constrained by the size of the physical memory.
Techniques such as swapping and paging are used to manage processes larger than the physical memory by temporarily transferring data to secondary storage. However, at any given instance, the parts of the process that are executing must be in physical memory.