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310-025
Leading the way in IT testing and certification tools, www.testking.com
Question No 51
Exhibit:
1. import java.io.IOException;
2. public class ExceptionTest(
3. public static void main (String[]args)
4. try (
5. methodA();
6. ) catch (IOException e) (
7. system.out.printIn(“Caught IOException”);
8. ) catch (Exception e) (
9. system.out.printIn(“Caught Exception”);
10. )
11. )
12. public void methodA () {
13. throw new IOException ();
14. )
15. )
What is the result?
A. The code will not compile.
B. The output is caught exception.
C. The output is caught IOException.
D. The program executes n......' />
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SCJP考試題310-025(第二套<3>)51-91/147 </font>
<font size=1 color=gray>閱讀次數2183</font> <p align='right'>出處 CN-JAVA原創：huiwu917 </p> </p>
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這是第2套題中的51-90題,只因為上網時間不多!所以只有借個地方粘貼出來!因為題確實太多,所以想要全部題目的給我的郵箱huiwu917@gmial.com 發個信息!寫明SCJP考試試題第2套!<br />
310-025<br />
Leading the way in IT testing and certification tools, www.testking.com<br />
Question No 51<br />
Exhibit:<br />
1. import java.io.IOException;<br />
2. public class ExceptionTest(<br />
3. public static void main (String[]args)<br />
4. try (<br />
5. methodA();<br />
6. ) catch (IOException e) (<br />
7. system.out.printIn(“Caught IOException”);<br />
8. ) catch (Exception e) (<br />
9. system.out.printIn(“Caught Exception”);<br />
10. )<br />
11. )<br />
12. public void methodA () {<br />
13. throw new IOException ();<br />
14. )<br />
15. )<br />
What is the result?<br />
A. The code will not compile.<br />
B. The output is caught exception.<br />
C. The output is caught IOException.<br />
D. The program executes normally without printing a message.<br />
Answer: A<br />
Question No 52<br />
Exhibit:<br />
1. public class test {<br />
2. public static string output = “”<br />
3.<br />
4. public static void foo(int i) {<br />
5. try {<br />
6. if(i= =1) {<br />
7. throw new Exception ();<br />
8. }<br />
9. output += “1”;<br />
10. )<br />
11. catch(Exception e) {<br />
12. output += “2”;<br />
13. return;<br />
14. )<br />
15. finally (<br />
16. output += “3”;<br />
17. )<br />
18. output += “4”;<br />
19. )<br />
20.<br />
21. public static void main (string args[]) (<br />
22. foo(0);<br />
23. foo(1);<br />
24.<br />
25. )<br />
26. )<br />
What is the value of the variable output at line 24?<br />
Answer: 13423<br />
Question No 53<br />
Given:<br />
1. public class Foo implements Runnable (<br />
2. public void run (Thread t) {<br />
3. system.out.printIn(“Running.”);<br />
4. }<br />
5. public static void main (String[] args) {<br />
6. new thread (new Foo()).start();<br />
7. )<br />
8. )<br />
What is the result?<br />
A. An exception is thrown.<br />
B. The program exists without printing anything.<br />
C. An error at line 1 causes compilation to fail.<br />
D. An error at line 2 causes the compilation to fail.<br />
E. “Running” is printed and the program exits.<br />
Answer: D<br />
Question No 54<br />
Which statement is true?<br />
A. If only one thread is blocked in the wait method of an object, and another thread executes the<br />
modify on that same object, then the first thread immediately resumes execution.<br />
B. If a thread is blocked in the wait method of an object, and another thread executes the notify<br />
method on the same object, it is still possible that the first thread might never resume execution.<br />
C. If a thread is blocked in the wait method of an object, and another thread executes the notify<br />
method on the same object, then the first thread definitely resumes execution as a direct and sole<br />
consequence of the notify call.<br />
D. If two threads are blocked in the wait method of one object, and another thread executes the notify<br />
method on the same object, then the first thread that executed the wait call first definitely resumes<br />
execution as a direct and sole consequence of the notify call.<br />
Answer: B<br />
Question No 55<br />
Which two CANNOT directly cause a thread to stop executing? (Choose Two)<br />
A. Calling the yield method.<br />
B. Calling the wait method on an object.<br />
C. Calling the notify method on an object.<br />
D. Calling the notifyAll method on an object.<br />
E. Calling the start method on another Thread object.<br />
Answer: C, D<br />
Question No 56<br />
Which two can be used to create a new Thread? (Choose Two)<br />
A. Extend java.lang.Thread and override the run method.<br />
B. Extend java.lang.Runnable and override the start method.<br />
C. Implement java.lang.thread and implement the run method.<br />
D. Implement java.lang.Runnable and implement the run method.<br />
E. Implement java.lang.Thread and implement the start method.<br />
Answer: A, D<br />
<br />
Question No 54<br />
Which statement is true?<br />
A. If only one thread is blocked in the wait method of an object, and another thread executes the<br />
modify on that same object, then the first thread immediately resumes execution.<br />
B. If a thread is blocked in the wait method of an object, and another thread executes the notify<br />
method on the same object, it is still possible that the first thread might never resume execution.<br />
C. If a thread is blocked in the wait method of an object, and another thread executes the notify<br />
method on the same object, then the first thread definitely resumes execution as a direct and sole<br />
consequence of the notify call.<br />
D. If two threads are blocked in the wait method of one object, and another thread executes the notify<br />
method on the same object, then the first thread that executed the wait call first definitely resumes<br />
execution as a direct and sole consequence of the notify call.<br />
Answer: B<br />
Question No 55<br />
Which two CANNOT directly cause a thread to stop executing? (Choose Two)<br />
A. Calling the yield method.<br />
B. Calling the wait method on an object.<br />
C. Calling the notify method on an object.<br />
D. Calling the notifyAll method on an object.<br />
E. Calling the start method on another Thread object.<br />
Answer: C, D<br />
Question No 56<br />
Which two can be used to create a new Thread? (Choose Two)<br />
A. Extend java.lang.Thread and override the run method.<br />
B. Extend java.lang.Runnable and override the start method.<br />
C. Implement java.lang.thread and implement the run method.<br />
D. Implement java.lang.Runnable and implement the run method.<br />
E. Implement java.lang.Thread and implement the start method.<br />
Answer: A, D<br />
<br />
Question No 57<br />
Given:<br />
1. public class SyncTest (<br />
2. private int x;<br />
3. private int y;<br />
4. private synchronized void setX (int i) (x=1;)<br />
5. private synchronized void setY (int i) (y=1;)<br />
6. public void setXY(int 1)(set X(i); setY(i);)<br />
7. public synchronized Boolean check() (return x !=y;)<br />
8. )<br />
Under which conditions will check () return true when called from a different class?<br />
A. Check() can never return true.<br />
B. Check() can return true when setXY is called by multiple threads.<br />
C. Check() can return true when multiple threads call setX and setY separately.<br />
D. Check() can only return true if SyncTest is changed to allow x and y to be set separately.<br />
Answer: B<br />
Question No 58<br />
Exhibit:<br />
1. class A implements runable (<br />
2. int i;<br />
3. public void run () (<br />
4. try (<br />
5. thread.sleep(5000);<br />
6. i= 10;<br />
7. ) catch(InterruptedException e) {}<br />
8. )<br />
9. )<br />
10.<br />
11. public class Test {<br />
12. public static void main (string args[]) (<br />
13. try (<br />
14. A a = new A ();<br />
15. Thread t = new Thread (a);<br />
16. t.start();<br />
17.<br />
18. int j= a.i;<br />
19.<br />
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