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From which memory does the compiler revert to if a variable is declared volatile?

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From which memory does the compiler revert to if a variable is declared volatile?

(a) RAM

(b) Storage Register

(c) ROM

(d) EEPROM

I had been asked this question by my school principal while I was bunking the class.

The doubt is from Variable Scope and Qualifiers in division Arduino Programming of Arduino

1 Answer

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Right choice is (a) RAM

The best explanation: ‘volatile’ is a directive to the compiler. It makes the compiler load the variable from the Random-Access Memory instead of the storage register. It is also called a variable qualifier. It can be used if exactly precise values are to be stored.

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