Question 1

1class Student {
2    String name;
3    public Student(String n) {
4        name = n;
5    }
6    public String toString() {
7        return "Name = " + name;
8    }
9}
10class Leader extends Student {
11    private int marks;
12    public Leader(String n, int m) {
13        super(n);
14        marks = m;
15    }
16    public Leader(Leader l) {
17        super(l.name);
18        marks = l.marks;
19    }
20    public String toString() {
21        return super.toString() + ", " + "Marks = " + marks;
22    }
23}
24public class College {
25    public static void main(String args[]) {
26        Student l1 = new Leader("Rohan", 97);
27        Student l2 = new Leader((Leader) l1);
28        l2.name = "Ananya";
29        System.out.println(l1 + "\n" + l2);
30    }
31}

Consider the Java program below. Consider the Java code given below. class Student { String name; public Student(String n) { name = n; } public String toString() { return "Name = " + name; } } class Leader extends Student { private int marks; public Leader(String n, int m) { super(n); marks = m; } public Leader(Leader l) { super(l.name); marks = l.marks; } public String toString() { return super.toString() + ", " + "Marks = " + marks; } } public class College { public static void main(String args[]) { Student l1 = new Leader("Rohan", 97); Student l2 = new Leader((Leader) l1); l2.name = "Ananya"; System.out.println(l1 + "\n" + l2); } } What will the output be? Method `Optional.ofNullable(T value)` returns an `Optional` that describes the specific value, if non-null; otherwise returns an empty `Optional`.\ Based on this description, consider the code given below, and answer the question that follows. import java.util.*; class GoldQC { String type; int karats; public GoldQC(int k){ karats = k; } public GoldQC(String t, int k){ type = t; karats = k; } } public class Test { public static void main(String[] args) { var goldList = new ArrayList<GoldQC>(); goldList.add(new GoldQC("Ring", 24)); goldList.add(new GoldQC(18)); for (GoldQC g: goldList) { System.out.print("karats = " + g.karats + ", type = "); Optional<String> karatsValue = Optional.ofNullable(g.type); karatsValue.ifPresentOrElse(t -> System.out.println(t), () -> System.out.println("unknown") ); } } } Choose the correct option. Consider the Java code give below. abstract class Operation implements Runnable { static int result = 0; } class AddOperation extends Operation { public void run() { if (result != 8) { result = result + 3; } } } class MultiplyOperation extends Operation { public void run() { if (result != 9) { result = result * 2; } } } public class MathOperations { public static void main(String[] args) { Operation addOp = new AddOperation(); Operation multiplyOp = new MultiplyOperation(); Thread t1 = new Thread(addOp); Thread t2 = new Thread(multiplyOp); t1.start(); t2.start(); System.out.println(Operation.result); } } Choose the correct option.