Question

Upcasting is _____________________ without an explicit type cast.

(a) Always allowed for public inheritance

(b) Always allowed for protected inheritance

(c) Always allowed for private inheritance

(d) Not allowed

I got this question in a national level competition.

I'm obligated to ask this question of Upcasting topic in section Default Arguments vs Overloading, Upcasting and Downcasting of Object Oriented Programming

Answer 1

Right answer is (a) Always allowed for public inheritance

The best explanation: The public inheritance shows the most flexible is-a relationship. Hence explicit type casting is not required. Implicit type casting is done by the compiler.