Question at position 30 What is an example of compile-time polymorphism in Java?Method overridingMethod overloadingInheritanceObject creationClear my selection单项选择题
A
Method overriding
B
Method overloading
C
Inheritance
D
Object creation

Question

Question at position 30 What is an example of compile-time polymorphism in Java?Method overridingMethod overloadingInheritanceObject creationClear my selection

BlackTom AI · Accepted Answer

The question asks for an example of compile-time polymorphism in Java, so we need to consider how the language resolves method calls.
Option 1: Method overriding. This is an example of runtime (dynamic) polymorphism, because the method to execute is determined at runtime based on the object's actual type, not at compile time. Therefore, this option describes runtime polymorphism rather than compile-time.
Option 2: Method overloading. This is the classic case of compile-time (static) polymorphism. Multiple methods in the same class share the same name but have different parameter lists (types, numbers, or both). The compiler determines which version to call by inspecting the arguments at compile time, hence it’s resolved during compilation.
Option 3: Inheritance. While inheritance enables polymorphic behavior through overridden methods, by itself it is a structural concept that supports both compile-time and runtime polymorphism depending on how methods are used. It is not, on its own, a direct example of polymorphism type.
Option 4: Object creation. Creating objects is a fundamental operation in OOP but does not by itself implement polymorphism; it doesn’t specify multiple method forms or dispatch rules, so it’s not an example of compile-time polymorphism.
In summary, the distinction hinges on when the method to execute is selected: overloading uses different parameter lists to resolve at compile time, whereas overriding uses the runtime type to resolve at runtime. The other options do not exemplify compile-time polymorphism in the same way.

Question at position 30 What is an example of compile-time polymorphism in Java?Method overridingMethod overloadingInheritanceObject creationClear my selection单项选择题

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