Dynamic random-access memory (DRAM)     Dynamic random-access memory (DRAM) is a type of random-access memory that stores each bit of data  in a s eparate capacitor  within an integrated circuit.     The capacitor can be either charged or discharged; these two states are taken to represent the two values of a bit, conventionally called 0 and 1.     DRAM is the memory we use as physical memory that helps the PC/laptop to run applications.     A DRAM storage cell is dynamic in that it needs to be refreshed  or given new electronic charges every few milliseconds to compensate for charge leaks from the capacitor.     example  PC/laptop it has 2GB of RAM.     Static random-access memory  (SRAM)         SRAM (static RAM) is random access memory (RAM) that retains data bits in its memory  as long as power is being supplied .        SRAM does not have to be periodically refreshed .     example of SRAM is SRAM is used as cache memory.    
 
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