1Z0-501無料問題集「Oracle Java Certified Programmer」

質問 1

Exhibit:
1 . public class test {
2 .public static void add3 (Integer i) }
3 .int val = i.intValue ( );
4 .val += 3;
5 .i = new Integer (val);
6 .}
7 .
8 . public static void main (String args [ ] ){
9 .Integer i = new Integer (0);
1 0.add3 (i);
1 1.system.out.printIn (i.intValue ( ));
1 2.}
1 3.)
What is the result?

（A）The program prints "0".

（B）Compilation will fail.

（C）The program prints "3".

（D）Compilation will succeed but an exception will be thrown at line 3.

正解：A 解答を投票する

質問 2

Which two demonstrate encapsulation of data? (Choose Two)

（A）Member data have no access modifiers.

（B）Methods provide for access and modification of data.

（C）Member data can be modified directly.

（D）The access modifier to member data is private.

（E）The access modifier for methods is protected.

正解：B、D 解答を投票する

質問 3

Given:
1 . String foo = "blue";
2 . Boolean[]bar = new Boolean [1];
3 . if (bar[0]){
4 .foo = "green";
5 .}
What is the result?

（A）The code will not compile.

（B）An exception is thrown.

（C）Foo has the value of "blue"

（D）Foo has the value of "green"

（E）Foo has the value of ""

（F）Foo has the value of null.

正解：A 解答を投票する

質問 4

Given:
1 . public class Foo implements Runnable (
2 . public void run (Thread t) {
3 . system.out.printIn("Running.");
4 . }
5 . public static void main (String[] args){
6 . new thread (new Foo()).start();
7 . )
8 . )
What is the result?

（A）An exception is thrown.

（B）"Running" is printed and the program exits.

（C）An error at line 1 causes compilation to fail.

（D）The program exists without printing anything.

（E）An error at line 6 causes the compilation to fail.

正解：C 解答を投票する

質問 5

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 height of the button labeled "North" can very if the Frame is resized.

（B）The height of the button labeled "South" 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 buttons labeled "North" and "South" will have the same height.

（F）The width of the button labeled "South" is constant even if the Frame is resized.

正解：C、E 解答を投票する

質問 6

Which statement is true?

（A）If only one thread is blocked in the wait method of an object, and another thread executes the modify on that same object, then the first thread immediately resumes execution.

（B）If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, it is still possible that the first thread might never resume execution.

（C）If a thread is blocked in the wait method of an object, and another thread executes the notify method on the same object, then the first thread definitely resumes execution as a direct and sole consequence of the notify call.

（D）If two threads are blocked in the wait method of one object, and another thread executes the notify method on the same object, then the first thread that executed the wait call first definitely resumes execution as a direct and sole consequence of the notify call.

正解：B 解答を投票する

1Z0-501 無料問題集「Oracle Java Certified Programmer」

弊社を連絡する

関連リンク

トップ試験