Cuestionario 1. 1Z0-808

Given:

interface Readable {
 
    public void readBook();
 
    public void setBookMark();
}
 
abstract class Book implements Readable { // line n1
 
    public void readBook() {
    }
    // line n2
}
 
class EBook extends Book{ // line n3
    public void readBook(){
        
    }
 
    // line n4
}

Which option enables the code to compile?

Given the code fragment:

List<String> names = new ArrayList<>();
names.add("Robb");
names.add("Bran");
names.add("Rick");
names.add("Bran");
if (names.remove("Bran")) {
    names.remove("Jon");
}
System.out.println(names);

What is the result?

class A {
 
    public A() {
        System.out.print("A ");
    }
}
 
class B extends A {
 
    public B() {
        System.out.print("B ");
    }
}
 
class C extends B {
 
    public C() {
        System.out.print("C ");
    }
 
    public static void main(String[] args) {
        C c = new C();
    }
}

What is the result?

class X {
 
    static int i;
    int j;
 
    public static void main(String[] args) {
        X x1 = new X();
        X x2 = new X();
        x1.i = 3;
        x1.j = 4;
        x2.i = 5;
        x2.j = 6;
        System.out.println(
                x1.i + " "
                + x1.j + " "
                + x2.i + " "
                + x2.j);
    }
}

What is the result?

public class Test {
    public static void main(String[] args) {
        /* insert code here */
        array[0] = 10;
        array[1] = 20;
        System.out.print(array[0] + ":" + array[1]);
    }
}

Which code fragment, when inserted at line 3, enables the code to print 10:20?