Polymorphism

Question 1

Phenomenon where a single name may be used to represent multiple types

Answer 1

Polymorphism definition

Additional info:
Polymorphic variable can hold values of different types
Polymorphic function can be applied to arguments of a variety of types

Question 2

Overriding

Answer 2

Specific type of polymorphism
When there is a method call from an instance of the subtype referenced by the supertype, the method from the subtype is dynamically bound

Question 3

Objects and behaviors requiring a generic way of handling values in a uniform manner, without worrying about the type

Answer 3

Parametric Polymorphism

Question 4

Data types that allow for parametric polymorphism, and the functions that allow of it

Answer 4

Generic types; generic functions

Question 5

In Java, casting up along the type hierarchy is automatic and implicit

Answer 5

Upcasting or broadening conversion

car is-a vehicle
Vehicle c = new Car();

Question 6

In Java, casing down along the type hierarchy

Answer 6

Down casting or narrowing conversion

Car c = (Car) v;

Question 7

What is the ‘diamond problem’

Answer 7

Multiple inheritance
Living Thing
/ \
Animal Reptile
\ /
Snake

Question 8

Completely abstract class that is used to group related methods with empty bodies

Answer 8

Interface