Computer Concept Courses (CCC) Practice Test 2025 - Free Practice Questions and Study Guide

Physical RAM in a computer system refers to the actual amount of RAM (Random Access Memory) present in memory modules installed in the system. This is the space that the computer can use to temporarily store data that is actively in use or being processed. Physical RAM is crucial for the performance of the computer, as it allows for quick read and write access to data, enabling applications and processes to run smoothly.

In contrast, the other options refer to different types of memory or storage. The amount of data stored on the hard drive refers to long-term storage that retains information even when the computer is turned off, which does not pertain to the immediate working memory capabilities that physical RAM provides. The total virtual memory available encompasses not just physical RAM but also any additional memory provided by the hard drive through techniques like paging, which extends the RAM's capacity beyond what is physically installed. Lastly, cache memory is a smaller type of high-speed memory located within or very close to the CPU, used to store frequently accessed data and instructions; thus, it's also separate from the main physical RAM used by the system. Understanding these distinctions emphasizes the significance of physical RAM as the primary active memory used by a computer.