Given:
1. class MyException extends RuntimeException { }
2. public class Houdini {
3. public static void main(String[] args) throws Exception
4. throw new MyException();
5. System.out.println("success");
6. } }
Which are true (Choose all that apply.)

单项选择题Given:3. class IcelandicHorse {4. void tolt() {System.out.print( 4-beat ); }5. }6. public class Vafi extends IcelandicHorse {7. public static void main(String[] args) {8. new Vafi() .go();9. new IcelandicHorse() .tolt();10. }11. void go() {12. IcelandicHorse h1 = new Vafi();13. hl.tolt()14. Vafi v = (Vafi) h1;15. v.tolt();16. }17. void tolt() {System.out.print( pacey ); }18. }What is the result (Choose all that apply.)

多项选择题Given:2. class Pancake { }3. class BlueberryPancake extends Pancake { }4. public class SourdoughBlueberryPancake2 extends BlueberryPancake {5. public static void main(String[] args) {6. Pancake p4 = new SourdoughBlueberryPancake2();7. insert code here8. } }And the following six declarations (which are to be inserted independently at line 7):Ⅰ. Pancake p5 = p4;Ⅱ. Pancake p6 = (BlueberryPancake)p4;Ⅲ. BlueberryPancake b2 = (BlueberryPancake)p4;Ⅳ. BlueberryPancake b3 = (SourdoughBlueberryPancake2)p4;Ⅴ. SourdoughBlueberryPancake2 s1 = (BlueberryPancake)p4;Ⅵ. SourdoughBlueberryPancake2 s2 = (SourdoughBlueberryPancake2)p4;Which are true (Choose all that apply.)