Oracle 1Z0-501 Exam : Java Certified Programmer

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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

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

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

2. Exhibit:
1 . public class X{
2 . private static int a;
3 .
5 . public static void main (String[] args){
6 . modify (a);
7 . }
8 .
9 . public static void modify (int a) {
1 0. a++;
1 1.}
1 2. }
What is the result?

A) The program runs and prints "1"
B) The program runs but aborts with an exception.
C) En error "possible undefined variable" at line 5 causes compilation to fail.
D) The program runs and prints "0"
E) En error "possible undefined variable" at line 10 causes compilation to fail.

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

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

4. Which will declare a method that is available to all members of the same package and can be referenced without an instance of the class?

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

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

Solutions: