Sun Certified Java Developer Question:
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Explain Given:
1. public class Threads2 implements Runnable {
2.
3. public void run() {
4. System.out.println("run.");
5. throw new RuntimeException("Problem");
6. }
7. public static void main(String[] args) {
8. Thread t = new Thread(new Threads2());
9. t.start();
10. System.out.println("End of method.");
11. }
12. }
Which two can be results? (Choose two.)
A. java.lang.RuntimeException: Problem
B. run.
java.lang.RuntimeException: Problem
C. End of method.
java.lang.RuntimeException: Problem
D. End of method.
run.
java.lang.RuntimeException: Problem
E. run.
java.lang.RuntimeException: Problem
End of method.

Answer:

D:End of method.
run.
java.lang.RuntimeException: Problem
E:run.
java.lang.RuntimeException: Problem
End of method.

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Explain Given: 11. abstract class Vehicle { public int speed() { return 0; } 12. class Car extends Vehicle { public int speed() { return 60; } 13. class RaceCar extends Car { public int speed() { return 150; } ... 21. RaceCar racer = new RaceCar(); 22. Car car = new RaceCar(); 23. Vehicle vehicle = new RaceCar(); 24. System.out.println(racer.speed() + ", " + car.speed() 25. + ", " + vehicle.speed()); What is the result? A. 0, 0, 0 B. 150, 60, 0 C. Compilation fails. D. 150, 150, 150 E. An exception is thrown at runtime.Suppose A team of programmers is reviewing a proposed API for a new utility class. After some discussion, they realize that they can reduce the number of methods in the API without losing any functionality. If they implement the new design, which two OO principles will they be promoting? A. Looser coupling B. Tighter coupling C. Lower cohesion D. Higher cohesion E. Weaker encapsulation F. Stronger encapsulation