Which of the following best describes flash memory?

Flash memory is best described as a non-volatile memory that can be rewritten. This means that data stored in flash memory is retained even when the power is turned off, distinguishing it from volatile memory types, which lose their content without power.

Flash memory is widely used in various applications, such as USB drives, solid-state drives (SSDs), and memory cards, because of its ability to be electrically erased and reprogrammed, allowing users to overwrite existing data. This capability makes it extremely versatile for both storage and data transfer needs.

While read-only memory is designed primarily for data that doesn’t change, temporary storage locations like RAM are used for data that is actively in use and lost when power is off. Optical storage refers to media like CDs and DVDs, which store data in a different manner altogether, relying on laser technology for reading and writing. Therefore, the unique attributes of flash memory as a non-volatile, rewritable medium align perfectly with its definition.