WAEC Computer Studies 2018 Paper

Concept:A megabyte is a digital storage unit based on powers of two in computing.It equals $1024$ kilobytes, not $1000$ kilobytes.So the size is found by multiplying $1024$ kilobytes by $1024$ bytes per kilobyte.Explanation:Start with the base relation: $1$ kilobyte $= 1024$ bytes.In binary computing, each larger unit is $1024$ times the previous unit.Therefore, $1$ megabyte $= 1024 \times 1$ kilobyte.Substitute the kilobyte value: $1$ megabyte $= 1024 \times (1024)$ bytes.This simplifies to $1024 \times 1024$ bytes.Option B gives exactly $1024 \times 1024$ bytes.Options A and D use $1000$, which is the decimal approximation, not the binary standard.Option C uses $1048$, which is not a valid multiplier for this conversion.Answer:B. $1024 \times 1024$ bytes