Which memory type does NOT use flash memory?

The correct answer identifies Synchronous Dynamic RAM (SDRAM) as the memory type that does not use flash memory. SDRAM is a type of DRAM (Dynamic Random Access Memory) that synchronizes its operation with the system's bus speed, enabling quicker data access compared to traditional DRAM. It is a volatile memory, meaning it must have power to retain stored information and typically requires refreshing to maintain data integrity.

In contrast, flash memory is a non-volatile memory technology, used in devices like flash drives, which retain data even when powered off. SRAM, while also not using flash memory, serves a different purpose by being faster and used typically for cache memory due to its speed and low access time. Cache memory itself is often implemented using SRAM because of its performance characteristics, but is a distinct level of memory designed to improve speed for frequently accessed data. Thus, SDRAM stands out in this context as it solely represents a type of dynamic memory that operates independently of flash technology.