1Z0-803 Free Practice Test

Given the code fragment:
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1. A. 22
2. B. 12
3. C. 32
4. D. 33

Correct Answer: A
Variable b is set to 4.
Variableb is decreased to 3.
Variable b is decreased to 2 and then printed. Output: 2 Variable b is printed. Output: 2

Which two actions will improve the encapsulation of a class?

1. A. Changing the access modifier of a field from public to private
2. B. Removing the public modifier from a class declaration
3. C. Changing the return type of a method to void
4. D. Returning a copy of the contents of an array or ArrayList instead of a direct reference

Correct Answer: AD
Reference: http://www.tutorialspoint.com/java/java_access_modifiers.htm

Given:
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1. A. Change the access modifier of the setradius () method to private
2. B. Change the getArea () method public double getArea () { return area; }
3. C. When the radius is set in the Circle constructor and the setRadius () method, recomputed the area and store it into the area field
4. D. Change the getRadius () method: public double getRadius () {area = Math.PI * radius * radius; return radius;}

Correct Answer: BCD