Memory and data remanence

Question 1

volatile memory

Answer 1

it loses the memory content after a power loss (or within a few minutes)
RAM (Random Access memory)
SRAM (static RAM) Fast and expensive
DRAM (Dynamic RAM) slower and cheaper
SDRAM (synchronous DRAM)

Question 2

non-volatile memory

Answer 2

it keeps whatever it has stored, even if we turn the power off.
ROM (read-only memory)
PROM (programmable read only memory) –be written once. most of the time in factory
EPROM (erasable programmable read only memory). you would shine a UV light through the windows and that would erase the memory.
EEPROM (electrically erasable programmable read only memory)