What are the rules to implement an interface Yasser @Jobilize.com

Author: Yasser Ibrahim

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Question 102 / 297: Considering the following declaration for interface Convertable, which of the following code segments will compile?
Choose 3

public interface Convertable {
	
	int convertToInt();
	char convertToChar();

}

class Digit implements Convertable {

public char convertToChar() {

return 0;

}

public int convertToInt() {

return 0;

}

abstract class Digit implements Convertable {

int convertToInt() ;

char convertToChar();

}

abstract class Digit implements Convertable {

public int convertToInt() {

return 0;

}

abstract class Digit implements Convertable {

public int convertToInt() {

return 0;

}

char convertToChar();

}

class Digit implements Convertable {

int convertToInt() {

return 0;

}

char convertToChar() {

return 0;

}

interface Roundable extends Convertable {

int roundUp();

}

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Explanation:

An abstract class doesn't have to implement any or all of its super's methods.

Interface methods are implicitly public, so the methods being implemented must also marked be public.

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