Given:
java
Runnable task1 = () -> System.out.println("Executing Task-1");
Callable<String> task2 = () -> {
System.out.println("Executing Task-2");
return "Task-2 Finish.";
};
ExecutorService execService = Executors.newCachedThreadPool();
// INSERT CODE HERE
execService.awaitTermination(3, TimeUnit.SECONDS);
execService.shutdownNow();
Which of the following statements, inserted in the code above, printsboth:
"Executing Task-2" and "Executing Task-1"?

• A. execService.call(task2);
• B. execService.run(task1);
• C. execService.call(task1);
• D. execService.execute(task1);
• E. execService.submit(task2);
• F. execService.submit(task1);
• G. execService.execute(task2);
• H. execService.run(task2);

A module com.eiffeltower.shop with the related sources in the src directory.
That module requires com.eiffeltower.membership, available in a JAR located in the lib directory.
What is the command to compile the module com.eiffeltower.shop?

• A. bash
  CopyEdit
  javac -source src -p lib/com.eiffel.membership.jar -d out -m com.eiffeltower.shop
• B. css
  CopyEdit
  javac --module-source-path src -p lib/com.eiffel.membership.jar -d out -m com.eiffeltower.shop
• C. css
  CopyEdit
  javac -path src -p lib/com.eiffel.membership.jar -d out -m com.eiffeltower.shop
• D. css
  CopyEdit
  javac --module-source-path src -p lib/com.eiffel.membership.jar -s out -m com.eiffeltower.shop

Given:
java
import java.io.*;
class A implements Serializable {
int number = 1;
}
class B implements Serializable {
int number = 2;
}
public class Test {
public static void main(String[] args) throws Exception {
File file = new File("o.ser");
A a = new A();
var oos = new ObjectOutputStream(new FileOutputStream(file));
oos.writeObject(a);
oos.close();
var ois = new ObjectInputStream(new FileInputStream(file));
B b = (B) ois.readObject();
ois.close();
System.out.println(b.number);
}
}
What is the given program's output?

• A. ClassCastException
• B. 1
• C. NotSerializableException
• D. 2
• E. Compilation fails

Given:
java
CopyOnWriteArrayList<String> list = new CopyOnWriteArrayList<>();
list.add("A");
list.add("B");
list.add("C");
// Writing in one thread
new Thread(() -> {
list.add("D");
System.out.println("Element added: D");
}).start();
// Reading in another thread
new Thread(() -> {
for (String element : list) {
System.out.println("Read element: " + element);
}
}).start();
What is printed?

• A. It throws an exception.
• B. It prints all elements, but changes made during iteration may not be visible.
• C. Compilation fails.
• D. It prints all elements, including changes made during iteration.

Given:
java
Period p = Period.between(
LocalDate.of(2023, Month.MAY, 4),
LocalDate.of(2024, Month.MAY, 4));
System.out.println(p);
Duration d = Duration.between(
LocalDate.of(2023, Month.MAY, 4),
LocalDate.of(2024, Month.MAY, 4));
System.out.println(d);
What is the output?

• A. UnsupportedTemporalTypeException
• B. PT8784H
  P1Y
• C. P1Y
  PT8784H
• D. P1Y
  UnsupportedTemporalTypeException