Which one of the following is NOT a valid category of computer memory?

Correct option is B

Public memory is not a valid category of computer memory. Computer memory is categorized based on its functionality and hierarchy, such as primary memory, secondary memory, and tertiary memory.

Important Key Points:

1. Primary memory: It includes RAM (volatile memory) and ROM (non-volatile memory). It is directly accessible by the CPU and stores data temporarily during processing.
2. Secondary memory: Refers to storage devices like hard drives, SSDs, and optical disks. It provides long-term storage for data and programs.
3. Tertiary memory: This is used for archival and backup purposes, often involving storage systems like tape drives and optical jukeboxes.
4. The hierarchy of memory is critical in determining the speed and efficiency of data processing in computer systems.

Knowledge Booster:

·        Secondary memory: Provides permanent data storage but is slower compared to primary memory.

·        Primary memory: Essential for the system's operational speed and multitasking capabilities.

·        Tertiary memory: Serves as a cost-effective solution for massive data storage and retrieval, primarily used in large-scale systems.