Sun Java Certification Program 1.0 B

Section B
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QUESTION NO: 66
Given an ActionEvent, which method allows you to identify the affected Component?
A. Public class getClass()
B. Public Object getSource()
C. Public Component getSource()
D. Public Component getTarget()
E. Public Component getComponent()
F. Public Component getTargetComponent()

Answer: B

QUESTION NO: 67
Exhibit:
1. import java.awt.*;
2.
3. public class Test extends Frame {
4. public Test() {
5. add(new Label(“Hello”) );
6. add(new TextField(“Hello”) );
7. add(new Button(“Hello”) );
8. pack();
9. show();
10. }
11.
12. public static void main(String args[]) {
13. new Test ();
14. }
15. )
What is the result?
A. The code will not compile.
B. A Window will appear containing only a Button.
C. An IllegalArgumentException is thrown at line 6.
D. A Window button will appear but will not contain the Label, TextField, or
Button.
E. A Window will appear containing a Label at the top, a TextField below the
Label, and a Button below the TextField.
F. A Window will appear containing a Label on the left, a TextField to the right of
the Label, and a button to the right of the TextField.

Answer: B

QUESTION NO: 68
Exhibit:
1. class A {
2. public int getNumber(int a) {
3. return a + 1;
4. }
5. }
6.
7. class B extends A {
8. public int getNumber (int a) {
9. return a + 2
10. }
11.
12. public static void main (String args[]) {
13. A a = new B();
14. System.out.printIn(a.getNumber(0));
15. }
16. }
What is the result?
A. Compilation succeeds and 1 is printed.
B. Compilation succeeds and 2 is printed.
C. An error at line 8 causes compilation to fail.
D. An error at line 13 causes compilation to fail.
E. An error at line 14 causes compilation to fail.

Answer: B

QUESTION NO: 69
Given:
9. class BaseClass{
10. private float x= 1.0f;
11. protected void setVar (float f) {x = f;}
12. }
13. class SubClass extends BaseClass {
14. private float x = 2.0f;
15. //insert code here
16. }
Which two are valid examples of method overriding? (Choose Two)
A. Void setVar(float f) {x = f;}
B. Public void setVar(int f) {x = f;}
C. Public void setVar(float f) {x = f;}
D. Public double setVar(float f) {x = f;}
E. Public final void setVar(float f) {x = f;}
F. Protected float setVar() {x=3.0f; return 3.0f; }

Answer: C, E

QUESTION NO: 70
Which statement about static inner classes is true?
A. An anonymous class can be declared as static.
B. A static inner class cannot be a static member of the outer class.
C. A static inner class does not require an instance of the enclosing class.
D. Instance members of a static inner class can be referenced using the class name
of the static inner class.

Answer: C

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