Question: We use Pass by Constant Reference when: Function wants to modify the value, the value is expensive to copy and NULL is not valid Function

We use "Pass by Constant Reference" when:

Function wants to modify the value, the value is expensive to copy and NULL is not valid

Function wants to modify the value, the value is expensive to copy and NULL is valid

Function does not want to modify the value, the value is expensive to copy and NULL is valid

Function does not want to modify the parameter and the value is easy to copy

Function does not want to modify the value, the value is expensive to copy and NULL is not valid

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