Sun Certified Java Developer Interview Questions and Answers

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Sun Certified Java Developer Frequently Asked Questions in various Sun Certified Java Developer Interviews asked by the interviewer. So learn Sun Certified Java Developer with the help of this Sun Certified Java Developer Interview questions and answers guide and feel free to comment as your suggestions, questions and answers on any Sun Certified Java Developer Interview Question or answer by the comment feature available on the page.

  1. Sun Certified Java Developer questions updated at 12 Jul 11 in Category Certifications and visited 626 Times

Sun Certification Questions and Answers:

3 :: Explain IF you are remotely logged on to a Solaris machine, What command would you execute?

mt f /dev/rmt/0 status
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Top: Sun Certified Java Developer Interview Questions and Answers
Sun Certified Java Developer Interview Questions and Answers

Most Frequently Asked Sun Certification Interview Questions

☺
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
☺
Explain Given: 11. public static void parse(String str) { 12. try { 13. float f = Float.parseFloat(str); 14. } catch (NumberFormatException nfe) { 15. f = 0; 16. } finally { 17. System.out.println(f); 18. } 19. } 20. public static void main(String[] args) { 21. parse("invalid"); 22. } What is the result? A. 0.0 B. Compilation fails. C. A ParseException is thrown by the parse method at runtime. D. A NumberFormatException is thrown by the parse method at runtime.
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Explain Given: 1. public class Blip { 2. protected int blipvert(int x) { return 0; } 3. } 4. class Vert extends Blip { 5. // insert code here 6. } Which five methods, inserted independently at line 5, will compile? (Choose five.) A. public int blipvert(int x) { return 0; } B. private int blipvert(int x) { return 0; } C. private int blipvert(long x) { return 0; } D. protected long blipvert(int x) { return 0; } E. protected int blipvert(long x) { return 0; } F. protected long blipvert(long x) { return 0; } G. protected long blipvert(int x, int y) { return 0; }
☺
Explain Given:
11. class PingPong2 {
12. synchronized void hit(long n) {
13. for(int i = 1; i < 3; i++)
14. System.out.print(n + "-" + i + " ");
15. }
16. }
17. public class Tester implements Runnable {
18. static PingPong2 pp2 = new PingPong2();
19. public static void main(String[] args) {
20. new Thread(new Tester()).start();
21. new Thread(new Tester()).start();
22. }
23. public void run() { pp2.hit(Thread.currentThread().getId()); }
24. }
Which statement is true?
A. The output could be 5-1 6-1 6-2 5-2
B. The output could be 6-1 6-2 5-1 5-2
C. The output could be 6-1 5-2 6-2 5-1
D. The output could be 6-1 6-2 5-1 7-1
☺
Explain Given: 5. class Atom { 6. Atom() { System.out.print("atom "); } 7. } 8. class Rock extends Atom { 9. Rock(String type) { System.out.print(type); } 10. } 11. public class Mountain extends Rock { 12. Mountain() { 13. super("granite "); 14. new Rock("granite "); 15. } 16. public static void main(String[] a) { new Mountain(); } 17. } What is the result? A. Compilation fails. B. atom granite C. granite granite D. atom granite granite E. An exception is thrown at runtime. F. atom granite atom granite
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