Given:

public class Canvas implements Drawable {

public void draw () { }

}

public abstract class Board extends Canvas { }

public class Paper extends Canvas {

protected void draw (int color) { }

}

public class Frame extends Canvas implements Drawable {

public void resize () { }

abstract void open ();

}

public interface Drawable {

public abstract void draw ();

}

Which statement is true?

Given the code fragment:

What is the result?

Given:

and the code fragment:

What is the result?

Given:

and

Which interface from the java.util.function package should you use to refactor the class Txt?

Given:

Which is refactored code with functional interfaces?

Which statement is true about the single abstract method of the java.util.function.Predicate interface?

Given:

and the code fragment:

The threads t1 and t2 execute asynchronously and possibly prints ABCA or AACB.

You have been asked to modify the code to make the threads execute synchronously and prints ABC.

Which modification meets the requirement?

Given the content of resources /Message.properties:

greet = Good Day!

Given the content of resources/Message_de_DE.properties:

greet = Guten Tag!

Given the code fragment from C:\src\App.java:

Given the code fragment:

UnaryOperator < Double > uo1 = s - > s*2;//line n1

List < Double > loanValues = Arrays.asList(1000.0, 2000.0);

loanValues.stream()

.filter(lv - > lv > = 1500)

.map(lv - > uo1.apply(lv))//line n2

.forEach(s - > System.out.print(s + “ “));

What is the result?

Which two are elements of a singleton class? (Choose two.)