Answer 1

it is compile time polymorphism for further query check this link
https://www.quora.com/Is-constructor-overloading-example-of-runtime-polymorphism

Answer 2

Another excellent answer. I also liked the article referenced in the Quora link:
- http://www.geeksforgeeks.org/virtual-functions-and-runtime-polymorphism-in-c-set-1-introduction/