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Oracle 1Z0-501 Exam Syllabus Topics:

Oracle Java Certified Programmer Sample Questions:

1. Given:
1. class BaseClass {
2. Private float x = 1.0f ;
3. protected float getVar ( ) ( return x;)
4. }
5 . class Subclass extends BaseClass (
6 .private float x = 2.0f;
7 .//insert code here
8 . )
Which two are valid examples of method overriding? (Choose Two)

A) Public float getVar ( ) { return x;}
B) Float double getVar ( ) { return x;}
C) Public float getVar ( ) { return x;}
D) Float getVar ( ) { return x;}
E) Public float getVar (float f ) { return f;}

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

3. Given:
1 . public class test (
2 . public static void main (String args[]){
3 .int i = 0xFFFFFFF1;
4 .int j = ~i;
5 .
6 .}
7 . )
What is the decimal value of j at line 5?

A) An error at line 3 causes compilation to fail.
B) An error at line 4 causes compilation to fail.
C) 1
D) -15
E) 14
F) 0

4. Given:
1 . public class SyncTest {
2 . private int x;
3 . private int y;
4 . public synchronized void setX (int i) (x=1;)
5 . public synchronized void setY (int i) (y=1;)
6 . public synchronized void setXY(int 1)(set X(i); setY(i);)
7 . public synchronized Boolean check() (return x !=y;)
8 . )
Under which conditions will check () return true when called from a different class?

A) Check() can return true when setXY is called by multiple threads.
B) Check() can only return true if SyncTest is changed to allow x and y to be set separately.
C) Check() can never return true.
D) Check() can return true when multiple threads call setX and setY separately.

5. You need to store elements in a collection that guarantees that no duplicates are stored.
Which two interfaces provide that capability? (Choose Two)

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

Solutions: