QUESTION 4 12. What will be the output of below program? public class Test { public static void main(String[] args) { String x = "abc"; String y = "abc"; x.concat(y); System.out.print(x); } } abcabc What will be the output of below program? public class Test { public static void main(String[] args) { String s1 = "abc"; String s2 = "abc"; System.out.println("s1 == s2 is:" + s1 == s2); } QUESTION 7 What is a constructor? O another name for an instance variable o the return type of method o the method that creates an object, or instance of the class o the instantiation of an object QUESTIONS What does it mean when a method is static? o it modifies or mutates an object o it applies to the entire class, not just one object or instance o it is private o it is overloaded