Which of the following statements about memory technologies is true?
Flash memory is nonvolatile and commonly used in personal mobile devices, while magnetic disks are the slowest and largest memory technology used in servers.
DRAM is faster than SRAM but has a higher cost per bit due to its larger capacity.
Magnetic disks have faster access times compared to DRAM but are more expensive per bit.
SRAM requires periodic refresh to maintain data, whereas DRAM does not.