Question

Why is the Arduino Mega more a viable solution when dealing with complex projects, than the Arduino UNO?

(a) Higher SRAM on the Arduino Mega

(b) More number of GPIO pins on the Arduino Mega

(c) More flash memory on the Arduino Mega

(d) Higher power rating on the Arduino Mega

The question was posed to me during an interview for a job.

This intriguing question comes from Uses for Different Arduino Boards in portion Board Specifications and Types of Arduino

Answer 1

Correct answer is (d) Higher power rating on the Arduino Mega

For explanation I would say: The Arduino UNO has 14 pins for IO of which 6 support PWM, while the Arduino Mega has 54 pins for IO of which 14 support PWM. Moreover, the Arduino Mega uses the Atmega2560 microcontroller which has an SRAM of 4K bytes and a flash memory of 256K bytes, whereas the Arduino UNO which is supported by the Atmega328P microcontroller has an SRAM of only 2K bytes and a flash memory of a mere 32K bytes.