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1 KB equals:

A1 byte
B1024 bytes (binary) or 1000 bytes (decimal/SI)
C100 bytes
D1000 bits
Answer & Solution
Correct answer: B. 1024 bytes (binary) or 1000 bytes (decimal/SI)
Originally 1 KB = 1024 bytes (binary). SI now defines 1 KB = 1000 bytes; 1024 = 1 KiB (kibibyte). Common usage still has both conventions. Memory sizes (RAM): binary. Storage sizes (HDD): often decimal.
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