What storage holds data that is currently in active use?

Primary memory, or RAM (Random Access Memory), is the storage that holds data currently in active use. This type of memory is fast and volatile, meaning it temporarily stores information that the CPU needs to access quickly while a computer is running. When a program is executed, it is loaded from secondary storage (like a hard drive) into primary memory, allowing the CPU to access the data and instructions rapidly.

Conversely, secondary storage refers to non-volatile storage, where data is stored persistently and is not directly accessed by the CPU while executing programs. Dynamic and static data structures relate to how data is organized and managed in memory, rather than indicating the storage type itself. In summary, primary memory is essential for performance during active tasks, as it allows for quick read and write operations necessary for the system's ongoing processes.