Memory Units
Computers · मेमोरी इकाइयां · 18 facts
1
Bit is the smallest unit of data (0 or 1)
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1 Byte = 8 Bits
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1 KB (Kilobyte) = 1024 Bytes
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1 MB (Megabyte) = 1024 KB
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1 GB (Gigabyte) = 1024 MB
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1 TB (Terabyte) = 1024 GB
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RAM is volatile memory, data lost when power off
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ROM is non-volatile, stores permanent data
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Cache memory is fastest memory between CPU and RAM
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Hard Disk (HDD) is secondary storage device
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SSD is faster than HDD, uses flash memory
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Register is fastest and smallest memory inside CPU
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EEPROM can be electrically erased and reprogrammed
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Flash drive (pen drive) is portable USB storage device
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1 PB (Petabyte) = 1024 TB
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Optical discs (CD, DVD, Blu-ray) use laser for reading data
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Primary memory includes RAM and ROM
18
Secondary memory includes HDD, SSD, USB drives