Basi Java Short Questions 15 - 18

15. What does the new operator do? 16. What is the this reference used for? Describe its use with methods and with variables 17. Can a constructor have one or more parameters? 18. Can a class have more than one constructor? 19. Suppose the classes Foo3 and Foo4 are defined as shown. Let f be an instance of Foo4 Which of the statements below are invalid? public class Foo3 [ static F 04 f = new Food() ; public static void main (String [] args) [ // Statement (a) // Statement (b) // Statement (c) // Statement (d) // Statement (e) // Statement (f) // Statement (g) // Statement (h) System.out.println(f.i); System.out.println (f.s); f.imethod (); E. smethoa ); System.out.println (Foo4.i); System.out.println (Foo4.s); Foo4.imethod (); Foo4. smethod(); class Foo4 t int i; static String s; void imethod ) static void smethod() 1