Consider the following inheritance hierarchy that is used in a video game.
Which of the following declarations and initializations will not cause a compiler error?
Character c = new FlyingDragon();
FlyingDragon f = new Character();
Dragon d = new Villain();
Villain v = new Skeleton();
Dragon d = new ShopKeeper();
Definitions:
UI
Universal Instantiation, a logical rule of inference stating if something is true for everything in a category, it is true for any specific instance of that category.
Quantifier-Negation Rule
A principle in formal logic that deals with the relationship between quantifiers and the negation of statements.
Quantifier
A symbol or word in logic that specifies the quantity of specimens in the domain of discourse that satisfy an open formula.
Negation
The contradiction or denial of something, or the operation of inverting the truth value in logic.
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