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Java Final

Java I - Final Exam

what is an interface in Java a collection of constants and methods
can an interface ever contain method bodies no
when a class implements an interface, what must it do it must declare and provide a method of body for each method in the interface
(True/False) a child class can extend just on parent and can implement zero or more interfaces true
Is the following a correct way to start out an interface class definition: public class SomeClass implements MyInterface Yes --SomeClass is automatically a child of the class Object
Look at the following interface: interface Taxable {double taxRate = 0.06 ; double calculateTax();} is the interface correct? Yes -- taxRate will automatically be a constant since it is in an interface
Can an Interface name be used as the type of a variable, like this: public static void main (String [] args) {SomeInterface x: ...} Yes--the variable can refer to any object who's class implements the interface
Is it OK if a class definition implements two different interfaces, each of which has the same definition for the constant PI? No--=if a class implements several interfaces, each constant must be defined in only one interface
Can an intefrace be given the private access modifier No--then the interface would never be used
Can an interface extend another interface Yes
Created by: kandriot