Given: java
Runnable task1 = () -> System.out.println("Executing Task-1"); Callable 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"?

1. A. execService.call(task1);
2. B. execService.call(task2);
3. C. execService.execute(task1);
4. D. execService.execute(task2);
5. E. execService.run(task1);
6. F. execService.run(task2);
7. G. execService.submit(task1);
8. H. execService.submit(task2);

Correct Answer: GH

What do the following print? java
public class DefaultAndStaticMethods { public static void main(String[] args) { WithStaticMethod.print();
}
}
interface WithDefaultMethod { default void print() { System.out.print("default");
}
}
interface WithStaticMethod extends WithDefaultMethod { static void print() {
System.out.print("static");
}
}

1. A. nothing
2. B. default
3. C. Compilation fails
4. D. static

Correct Answer: D

Given: java
Map map = Map.of("b", 1, "a", 3, "c", 2); TreeMap treeMap = new TreeMap<>(map); System.out.println(treeMap);
What is the output of the given code fragment?

1. A. {c=2, a=3, b=1}
2. B. {b=1, a=3, c=2}
3. C. {b=1, c=2, a=3}
4. D. {c=1, b=2, a=3}
5. E. Compilation fails
6. F. {a=3, b=1, c=2}
7. G. {a=1, b=2, c=3}

Correct Answer: F

Given: java
public class SpecialAddition extends Addition implements Special { public static void main(String[] args) {
System.out.println(new SpecialAddition().add());
}
int add() {
return --foo + bar--;
}
}
class Addition { int foo = 1;
}
interface Special { int bar = 1;
}
What is printed?

1. A. 1
2. B. 2
3. C. It throws an exception at runtime.
4. D. Compilation fails.

Correct Answer: E

Given: java
interface Calculable { long calculate(int i);
}
public class Test {
public static void main(String[] args) { Calculable c1 = i -> i + 1; // Line 1 Calculable c2 = i -> Long.valueOf(i); // Line 2
Calculable c3 = i -> { throw new ArithmeticException(); }; // Line 3
}
}
Which lines fail to compile?

1. A. Line 1 and line 3
2. B. Line 2 only
3. C. Line 1 only
4. D. Line 1 and line 2
5. E. Line 2 and line 3
6. F. Line 3 only
7. G. The program successfully compiles

Correct Answer: G