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Difference between RAM and ROM

FeatureRAMROM
Full formRandom Access MemoryRead-Only Memory
VolatilityVolatile memoryNon-volatile memory
Read/WriteRead and write operationsRead-only operations
Data StorageTemporary storage for data and instructionsPermanent storage for firmware and software instructions
Data RetentionRequires power to retain dataData retention even without power
TypesDifferent types (e.g., DRAM, SRAM)Different types (e.g., PROM, EPROM, EEPROM)
UsageUsed for active program execution and data storageUsed for storing firmware, boot loaders, and software instructions
ModifiabilityCan be modified or overwrittenTypically pre-programmed during manufacturing
SizeGenerally larger capacitiesSmaller capacities compared to RAM
SpeedFaster access and data transfer speedsSlower access and data transfer speeds
ExamplesDDR4, DDR3, SRAMPROM, EPROM, EEPROM