Java Quiz 1: 16 October 2022 (September 2022 term)

1interface Readable{
2  public default void read(){
3    System.out.println("Reads");
4  }
5}
6interface Writable{
7  public default void write(){
8    System.out.println("Writes");
9  }
10}
11class Document implements Readable, Writable{
12  public void read(){
13    System.out.println("Reads the lines in doc");
14  }
15}
16public class Test {
17  public static void main(String[] args) {
18    Readable r1 = new Document();
19    r1.read();
20    r1.write();
21  }
22
23}

1interface Iterator{
2  public boolean has_next();
3  public Object get_next();
4}
5class Faculty{
6  // ...
7  private class FacIter implements Iterator{
8    // ....
9    public boolean has_next() {
10      // ...
11      return false;
12    }
13    public Object get_next() {
14      // ...
15    }
16  }
17  public Iterator getIterator() {
18      return new FacIter();
19  }
20}
21public class Test{
22    public static void main(String[] args) {
23        Faculty fList = new Faculty();
24        //CODE BLOCK                                 // LINE-1
25        boolean hasNext = iter.has_next();            // LINE-2
26    }
27}

1class Experiment{
2  public void begin(){
3    Simulation s = new Simulation(this); // LINE 1
4    s.simulate();
5    System.out.println("Experiment finished");
6  }
7  public void alarm(){
8    System.out.println("Collected results");
9  }
10}
11class Simulation{
12  Experiment exp;
13  public Simulation(Experiment e){
14    exp = e;
15  }
16  public void simulate(){
17    System.out.println("Simulated Successfully");
18    exp.alarm(); // LINE 2
19  }
20}
21public class Test {
22  public static void main(String[] args) {
23    Experiment e1 = new Experiment();
24    e1.begin();
25  }
26}