Given this class:

Which two changes would encapsulate this class and ensure that the area field is always equal to length * height whenever the Rectangle class is used?

1. A. Call the setArea method at the end of the setHeight method.
2. B. Call the setArea method at the beginning of the setHeight method.
3. C. Call the setArea method at the end of the setLength method.
4. D. Call the setArea method at the beginning of the setLength method.
5. E. Change the setArea method to private.
6. F. Change the area field to public.

Correct Answer: AE

Given:

What is the result?

1. A. AB
2. B. AC
3. C. CC
4. D. A ClassCastException is thrown only at line n1.
5. E. A ClassCastException is thrown only at line n2.

Correct Answer: B

Which three statements describe the object-oriented features of the Java language? (Choose three.)

1. A. Objects cannot be reused.
2. B. A subclass must override the methods from a superclass.
3. C. Objects can share behaviors with other objects.
4. D. A package must contain a main class.
5. E. Object is the root class of all other objects.
6. F. A main method must be declared in every class.

Correct Answer: BCF

Given the definitions of the MyString class and the Test class:

What is the result?

1. A. Option A
2. B. Option B
3. C. Option C
4. D. Option D
5. E. Option E

Correct Answer: D

Given:

What is the result?

1. A. 10 : 30 : 6
2. B. 10 : 22 : 22
3. C. 10 : 22 : 20
4. D. 10 : 22 : 6

Correct Answer: A