Oracle 1Z0-501 試験概要:

Oracle 1Z0-501 試験シラバストピック:

Oracle Java Certified Programmer 認定 1Z0-501 試験問題：

問題 #1

Which will declare a method that forces a subclass to implement it?

A. Abstract public void methoda();
B. Static void methoda (double d1) {}
C. Public native double methoda();
D. Protected void methoda (double d1){}
E. Public double methoda();

問題 #2

Exhibit:
1 . class A {
2 . public String toString (){
3 . return "4";
4 .}
5 .}
6 . class B extends A {
7 .8.public String toString (){
8 . return super.toString()+ "3";
9 .}
1 0. }
1 1. public class Test {
1 2. public static void main(String[]args){
1 3.System.out.printIn(new B());
1 4.}
15.}
What is the result?

A. An error on line 9 causes compilation to fail.
B. An error on line 14 causes compilation to fail.
C. Compilation succeeds and 4 is printed.
D. Compilation succeeds and 43 is printed.
E. Compilation succeeds but an exception is thrown at line 9.

問題 #3

Exhibit:
1 . import java.awt.*;
2 .
3 . public class X extends Frame {
4 . public static void main (String [] args) {
5 . X x = new X();
6 . x.pack();
7 . x.setVisible(true);
8 .}
9 .
1 0. public X(){
1 1. setLayout (new BordrLayout());
1 2. Panel p = new Panel ();
1 3. add(p, BorderLayout.NORTH);
1 4. Button b = new Button ("North");
1 5. p.add(b):
1 6. Button b = new Button ("South");
1 7. add(b1, BorderLayout.SOUTH):
1 8.}
1 9.}
Which two statements are true? (Choose Two)

A. The buttons labeled "North" and "South" will have the same height.
B. The height of the button labeled "North" can very if the Frame is resized.
C. The width of the button labeled "North" is constant even if the Frame is resized.
D. The buttons labeled "North" and "South" will have the same width.
E. The width of the button labeled "South" is constant even if the Frame is resized.
F. The height of the button labeled "South" can very if the Frame is resized.

問題 #4

Given:
1 . public class Test {
2 . public static void main (String []args){
3 . unsigned byte b = 0;
4 . b--;
5 .
6 .}
7 . }
What is the value of b at line 5?

A. -1
B. 255
C. Compilation will fail.
D. Compilation will succeed but the program will throw an exception at line 4.
E. 127

問題 #5

Exhibit:
1 . public class X implements Runnable(
2 . private int x;
3 . private int y;
4 .
5 . public static void main(String[]args)
6 . X that = new X();
7 .(new Thread(that)).start();
8 .(new Thread(that)).start();
9 .)
1 0.
1 1. public void run()(
1 2. for (;;)(
1 3. x++;
1 4. y++;
1 5. System.out.printIn("x=" + x + ", y = " + y);
1 6.)
1 7.)
1 8.)
What is the result?

A. The program prints pairs of values for x and y that might not always be the same on the same line(for example, "x=2, y=1").
B. Errors at lines 7 and 8 cause compilation to fail.
C. The program prints pairs of values for x and y that are always the same on the same line (for example, "x=1, y=1". In addition, each value appears only for once (for example, "x=1, y=1" followed by "x=2, y=2").
D. The program prints pairs of values for x and y that are always the same on the same line (forexample, "x=1, y=1". In addition, each value appears twice (for example, "x=1, y=1" followed by"x=1, y=1").

解説：