JAVA认证SCJP认证真题及答案（14）

　　QUESTION NO 126

　　Given:

　　1. public class OuterClass {

　　2. private double d1 1.0;

　　3. //insert code here

　　4. }

　　You need to insert an inner class declaration at line2. Which two inner class declarations are valid?

　　(Choose Two)

　　A. static class InnerOne {

　　public double methoda() {return d1;}

　　}

　　B. static class InnerOne {

　　static double methoda() {return d1;}

　　}

　　C. private class InnerOne {

　　public double methoda() {return d1;}

　　}

　　D. protected class InnerOne {

　　static double methoda() {return d1;}

　　}

　　E. public abstract class InnerOne {

　　public abstract double methoda();

　　}

　　Answer: C, E

　　QUESTION NO 127

　　Which two declarations prevent the overriding of a method? (Choose Two)

　　A. Final void methoda() {}

　　B. Void final methoda() {}

　　C. Static void methoda() {}

　　D. Static final void methoda() {}

　　E. Final abstract void methoda() {} www.ExamW.CoM

　　Answer: A, D

　　QUESTION NO 128

　　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.printIn(foo. i);

　　9. }

　　10. }

　　What is the result?

　　A. Compilation will fail.

　　B. Compilation will succeed and the program will print “3”

　　C. Compilation will succeed but the program will throw a ClassCastException at line 6.

　　D. Compilation will succeed but the program will throw a ClassCastException at line 7.

　　Answer: B

　　QUESTION NO 129

　　Which two create an instance of an array? (Choose Two)

　　A. int ia = new int [15];

　　B. float fa = new float [20];

　　C. char ca = “Some String”;

　　D. Object oa = new float[20];

　　E. Int ia = (4, 5, 6) (1, 2, 3)

　　Answer: A, D

　　QUESTION NO 130

　　Given:

　　1. public class ExceptionTest {

　　2. class TestException extends Exception {}

　　3. public void runTest () throws TestException {}

　　4. public void test () /* Point X*/ {

　　5. runTest ();

　　6. }

　　7. }

　　At point X on line 4, which code can be added to make the code compile?

　　A. Throws Exception.

　　B. Catch (Exception e).

　　C. Throws RuntimeException.

　　D. Catch (TestException e).

　　E. No code is necessary.

　　Answer: B