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(Sun Certified Java Programmer)SCJP 考试题及答案（最全）

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Sun Certified Java Programmer 历年考试题及答案

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Exam : 310-035

Title : Sun Certified Programmer for Java 2

Platform 1.4

Ver : 06.20.06

310-035

QUESTION 1:

Given:

1. public class Test {

2. public static void main(String args[]) {

3. class Foo {

4. public int i = 3;

5. }

6. Object o = (Object)new Foo();

7. Foo foo = (Foo)o;

8. System.out.println("i = " + foo.i);

9. }

10. }

What is the result?

A. i = 3

B. Compilation fails.

C. A ClassCastException is thrown at line 6.

D. A ClassCastException is thrown at line 7.

Answer: A

QUESTION 2:

Which two cause a compiler error? (Choose two)

A. float[] = new float(3);

B. float f2[] = new float[];

C. float[] f1 = new float[3];

D. float f3[] = new float[3];

E. float f5[] = { 1.0f, 2.0f, 2.0f };

F. float f4[] = new float[] { 1.0f. 2.0f. 3.0f};

Answer: A, B

The F. statement is incorrect. The float numbers should be separated with commas and not

dots.

QUESTION 3:

Given:

11. int i =1,j =10;

12. do {

13. if(i++> --j) {

14. continue;

15. }

Actualte s ts . com - The Po w er of Kno w ing

310-035

16. } while (i <5);

17. System.out.println("i = " +i+ "and j = "+j); What is the result?

A. i = 6 and j = 5

B. i = 5 and j = 5

C. i = 6 and j = 5

D. i = 5 and j = 6

E. i = 6 and j = 6

Answer: D

QUESTION 4:

Given:

1. class Test {

2. private Demo d;

3. void start() {

4. d = new Demo();

5. this.takeDemo(d);

6. }

8. void takeDemo(Demo demo) {

9. demo = null;

10. demo = new Demo();

11. }

12. }

When is the Demo object, created on line 3, eligible for garbage collection?

A. After line 5.

B. After line 9.

C. After the start() method completes.

D. When the takeDemo() method completes.

E. When the instance running this code is made eligible for garbage collection.

Answer: E

QUESTION 5:

Given:

1. interface Animal {

2. void soundOff();

3. }

5. class Elephant implements Animal {

6. public void soundOff() {

Actualte s ts . com - The Po w er of Kno w ing

310-035

7. System.out.println("Trumpet");

8. }

9. }

10.

11. class Lion implements Animal {

12. public void soundOff() {

13. System.out.println("Roar");

14. }

15. }

16.

17. class Alpha1 {

18. static Animal get( String choice ) {

19. if ( choice.equalsIgnoreCase( "meat eater" )) {

20. return new Lion();

21. } else {

22. return new Elephant();

23. }

24. }

25. }

Which compiles?

A. new Animal().soundOff();

B. Elephant e = new Alpha1();

C. Lion 1 = Alpha.get("meat eater");

D. new Alpha1().get("veggie").soundOff();

Answer: D

QUESTION 6:

Which statement is true?

A. Memory is reclaimed by calling Runtime.gc().

B. Objects are not collected if they are accessible from live threads.

C. Objects that have finalize() methods are never garbage collected.

D. Objects that have finalize() methods always have their finalize() methods called before

the program ends.

E. An OutOfMemory error is only thrown if a single block of memory cannot be found

that is large enough for a particular requirement.

Answer: B

QUESTION 7:

Given:

1. class A {

Actualte s ts . com - The Po w er of Kno w ing

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评论星级较低，若资源使用遇到问题可联系上传者，3个工作日内问题未解决可申请退款~

sntylts

2013-03-17

这个资源在现在不知道能不能涵盖到许多部分了，因为现在考试叫OCJP，考试代号为LZ0-851了，这个应该是以前的版本，不过还是谢谢了
johnxy

2013-09-07

还可以，可以参考一下！

ranko

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