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Oracle Java Certified Programmer Sample Questions:

1. CORRECT TEXT
Given:
3. string foo = "ABCDE";
4. foo.substring(3);
5. foo.concat("XYZ");
6. Type the value of foo at line 6.

2. How can you create a listener class that receives events when the mouse is moved?

A) By implementing MouseListener.
B) By implementing MouseMotionListener.
C) By extending MouseMotionListener.
D) Either by implementing MouseMotion Listener or implementing MouseListener.
E) Either by extending MouseMotionListener or extending MouseListener.
F) By extending MouseListener.

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

4. Which code determines the int value foo closest to a double value bar?

A) Int foo = (int) Math.abs(bar);
B) Int foo = (int) Math.max(bar);
C) Int foo = (int) Math.ceil(bar);
D) Int foo = (int) Math.floor(bar);
E) Int foo = (int) Math.round(bar);
F) Int foo = (int) Math.min(bar);

5. Which two construct an OutputSream that appends to the file "file.txt"? (Choose Two)

A) OutputStream out=new FileOutputStream("file.txt", "append");
B) OutputStream out=new FileOutputStream(new File("file.txt")true);
C) FileOutputStream out=new FileOutputStream(new file("file.txt"));
D) OutputStream out=new FileOutputStream("file.txt");
E) FileOutputStream out=new FileOutputStream("file.txt", true);

Solutions: