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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. 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();
1 0. }
1 1.
1 2. public static void main(String args[]) {
1 3.new Test ();
1 4.}
1 5. )
What is the result?

A) The code will not compile.
B) A Window will appear containing a Label at the top, a TextField below the Label, and a Buttonbelow the TextField.
C) A Window will appear containing a Label on the left, a TextField to the right of the Label, and abutton to the right of the TextField.
D) A Window will appear containing only a Button.
E) An IllegalArgumentException is thrown at line 6.
F) A Window button will appear but will not contain the Label, TextField, or Button.

2. Which two statements are true regarding the creation of a default constructor? (Choose Two)

A) The compiler always creates a default constructor for every class.
B) The default constructor initializes method variables.
C) The default constructor invokes the no-parameter constructor of the superclass.
D) The default constructor initializes the instance variables declared in the class.
E) When a class has only constructors with parameters, the compiler does not create a defaultconstructor.

3. Given:
1. class super {
2. public float getNum() {return 3.0f;}
3 . )
4 .
5 . public class Sub extends Super {
6 .
7 .)
Which method, placed at line 6, will cause a compiler error?

A) Public float getNum(){return 4.0f; }
B) Public void getNum (double d)
{ }
C) Public void getNum () { }
D) Public double getNum (float d) {retrun 4.0f; }

4. You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?

A) Java.util.StoredMap.
B) Java.util.Collection.
C) Java.util.Map.
D) Java.util.StoredSet.
E) Java.util.Set.
F) Java.util.List.

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 synchronized void run( ) (
1 2.for (;;) (
1 3.x++;
1 4.y++;
1 5.System.out.printIn("x = " + x
1 6.)
1 7.)
1 8. )
What is the result?
+ ", y = " + y);

A) 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")
B) 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=2s, y=2")
C) 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")
D) An error at line 11 causes compilation to fail.
E) Errors at lines 7 and 8 cause compilation to fail.

Solutions: