Written to more than a billion times a second okay that's not real it's not true you cannot read and write to disk a billion times a second but 70-413  becauseof having copies of things because it's a good the subset the abstraction on the point of view the processor processes out you mean I really do have memory decide son a disk but as fast as this top-level register that's really powerful abstraction and what are the most important things evolve that living below the bottom levels anything bigger than disc when you want to back up your hard rubber you do maybe next yr larger hard okay .

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