Which type of memory requires a constant power supply to function correctly?

The correct answer is SRAM. Static Random Access Memory (SRAM) is a type of volatile memory that requires a constant power supply to maintain the stored information. Unlike some other memory types, SRAM does not need to be refreshed constantly to retain data; however, it must remain powered to function. If the power supply is interrupted or turned off, the data in SRAM is lost.

In contrast, other options represent different memory types with varying characteristics. DRAM (Dynamic Random Access Memory), while also volatile, requires refresh cycles to maintain data integrity. ROM (Read-Only Memory) is non-volatile, meaning it retains data even when power is lost. Flash memory is also non-volatile and retains data without a constant power supply, making it suitable for storage devices like USB drives and SSDs.