Oracle Java Certified Programmer Sample Questions:

1. Given:
1. byte [] arry1, array2[];
2 . byte array3 [][];
3 . byte[][] array4;
If each array has been initialized, which statement will cause a compiler error?

A) Array2 = array3;
B) Array2 = array1;
C) Array2 = array4;
D) Both B and C
E) Both A and C
F) Both A and B

2. Which two are equivalent? (Choose Two)

A) 3*4
B) 3/2
C) 3*2^2
D) 3<2
E) 3<<<2
F) 3<<2

3. Which type of event indicates a key pressed on a java.awt.Component?

A) KeyDownEvent
B) KeyEvent
C) KeyPressedEvent
D) KeyPressEvent
E) KeyTypedEvent

4. Which two are equivalent? (Choose Two)

A) 16*4
B) 16>4
C) 16/2^2
D) 16/2
E) 16>>2
F) 16>>>2

5. Exhibit:
1 . class super {
2 .public int getLength(){return 4;}
3 .}
4 .
5 . public class Sub extends Super {
6 .public long getLength() {return 5;}
7 .
8 . public static void main (String[]args){
9 .super sooper = new Super ();
1 0. Sub sub = new Sub();
1 1. System.out.printIn(
1 2.sooper.getLength()+ "," + sub.getLength()};
1 3.}
1 4. }
What is the output?

A) 4, 5
B) 5, 5
C) 4, 4
D) 5, 4
E) The code will not compile.

Solutions: