Module 8 - 线程.docxVIP

Copyright Tarena Corporation,2008.All rights reservedModule 8 - 线程一、选择题 Question 1Which two code fragments will execute the method doStuff() in aseparate thread? (Choose two.)A. new Thread() {public void run() { doStuff(); }}B. new Thread() {public void start() { doStuff(); }}C. new Thread() {public void start() { doStuff(); }} .run();D. new Thread() {public void run() { doStuff(); }} .start();E. new Thread(new Runnable() {public void run() { doStuff(); }} ).run();F. new Thread(new Runnable() {public void run() { doStuff(); }}).start();Answer: DFQuestion 2Given:11. Runnable r = new Runnable() {12. public void run() {13. System.out.print( Cat );14. }15. };16. Threadt=new Thread(r) {17. public void run() {18. System.out.print( Dog );19. }20. };21. t.start();What is the result?Copyright Tarena Corporation,2008.All rights reservedA. CatB. DogC. Compilation fails.D. The code runs with no output.E. An exception is thrown at runtime.Answer: BQuestion 3Given:1. public class Threads3 implements Runnable {2. public void run() {3. System.out.print( running );4. }5. public static void main(String[] args) {6. Thread t = new Thread(new Threads3());7. t.run();8. t.run();9. t.start();10. }11. }What is the result?A. Compilation fails.B. An exception is thrown at runtime.C. The code executes and prints running .D. The code executes and prints runningrunning .E. The code executes and prints runningrunningrunning .Answer: EQuestion 4Click the Exhibit button:1. public class Threads 1 {2. Int x=0;3. public class Runner implements Runnable {4. public void run() {5. int current = 0;6. for(int i=0;i4;i++){7. current = x;8. System.out.print(current + , );9. x = current + 2;10. }11. }12. }13.14. public static void main(String[] args) {Copyright Tarena Corporation,2008.All rights reserved15. new Threads1().go();16. }17.18. public void go() {19. Runnable r1 = new Runner();20. new Thread(r1).start();21. new Thread(r1 ).start();22. }23. }Which two are possible results? (Choose two.)