A system has a 16-bit data bus and a 20-bit address bus. What is the maximum amount of data (in bytes) the system can directly address in memory?

bytes = 1 MB Explanation: Correct Option: (A) bytes = 1 MB Explanation In computer architecture, the amount of directly addressable memory is determined by the width of the Address Bus , not the Data Bus. Address Bus Width: The system has a 20-bit address bus. This means the CPU can generate unique memory addresses. Calculating Addressable Memory: Each memory address typically points to a storage unit of 1 byte. Therefore: Conversion: We know that: The data bus width (16-bit) determines the size of the word that can be transferred at once, but it does not limit the total memory capacity that the system can address.

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