What is the output(compare two enum values)? : Questions « Object Oriented « SCJP

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6.16.31.What is the output(compare two enum values)?

public class MainClass {

  public static void main(String[] argv) {

    if (MyEnum.X == MyEnum.Y) {

      System.out.println("Equals");

    }

    MyEnum x = MyEnum.X;

    MyEnum y = MyEnum.Y;



    if (x == y) {

      System.out.println("Equals");

    }else{

      System.out.println("Not Equals");

      

    }

  }

}



enum MyEnum {

  X, Y;

}

6.16.Questions
	6.16.1.	"X extends Y" is correct if and only if X is a class and Y is an interface(True/False)
	6.16.2.	Answer: interface extends
	6.16.3.	"X extends Y" is correct if and only if X is an interface and Y is a class(True/False)
	6.16.4.	Answer: class and interface
	6.16.5.	"X extends Y" is correct if X and Y are either both classes or both interfaces(True/False)
	6.16.6.	Answer: interface hierarchy
	6.16.7.	Which method names follow the JavaBeans standard?
	6.16.8.	Answer: JavaBeas naming convention
	6.16.9.	Which, inserted independently at 'insert code here', will compile?
	6.16.10.	Answer: method overloading and var-arg
	6.16.11.	What is the result(enum value)?
	6.16.12.	Answer: enum value
	6.16.13.	What is the result when trying to compiling the following code(abstract and interface)?
	6.16.14.	Answer: abstract and interface
	6.16.15.	What is the result when trying to compiling the following code(variable name)?
	6.16.16.	Answer: variable name
	6.16.17.	What is the result when trying to compiling the following code(array declaration)?
	6.16.18.	Answer: array declaration
	6.16.19.	What is the result when trying to compiling the following code(enum definition spot)?
	6.16.20.	Answer: enum definition spot
	6.16.21.	What is the result(enum and for loop)?
	6.16.22.	Answer: enum and for loop
	6.16.23.	What is the result(static method)?
	6.16.24.	Answer: static method
	6.16.25.	Is the following code compilable(subclass and override)?
	6.16.26.	Answer: subclass and override
	6.16.27.	Is the following code compilable(subclass and overloading)
	6.16.28.	Answer: subclass and overloading
	6.16.29.	Is the following code compilable(override and exception throws statements)?
	6.16.30.	Answer: override and exception throws statements
	6.16.31.	What is the output(compare two enum values)?
	6.16.32.	Answer: compare two enum values
	6.16.33.	What is the output of the following program(class inheritance and shadowing)?
	6.16.34.	Answer: class inheritance and shadowing
	6.16.35.	What is the output of the following program(inner class)?
	6.16.36.	Answer: using inner class
	6.16.37.	What is ture for a fully encapsulated class?
	6.16.38.	Answer: encapsulated class
	6.16.39.	What is an example of polymorphism?
	6.16.40.	Answer: polymorphism
	6.16.41.	Which modifiers may not be used with a top-level class?
	6.16.42.	Answer: Which modifiers may not be used with a top-level class
	6.16.43.	The compiler supplies a default constructor if no constructors are provided for a class(True/False).
	6.16.44.	Answer: default constructor
	6.16.45.	All constructors have a void return type(True/False).
	6.16.46.	Answer: return type for constructors
	6.16.47.	A constructor may throw an exception(True/False).
	6.16.48.	Answer: constructor and exception

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