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How many General-Purpose Registers are present in the Atmega2560?

(a) 12

(b) 32

(c) 64

(d) 9

I got this question in an internship interview.

This intriguing question comes from Microcontroller Specifications in division AtMega Microcontroller Specifications of Arduino

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The correct option is (b) 32

Explanation: There are 32 General-Purpose Registers in the chip and they are all connected to the ALU (Arithmetic Logical Unit) directly which allow 2 registers to be accessed in one instruction in a clock cycle.

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