Java & OO Intermediate - Part 2

This exam is bound to the course Java & OO Intermediate. Every question of this exam has a corresponding piece of theory covered in the course.

The first chapters of the course are covered by another exam: part 1.

These two exams together will grant you an orange belt. They replace the previous exams "Java SE Intermed" and "OO Intermed".

	Released	Beta	Frozen
Inheritance 2 questions Given a class hierarchy, identify parents and children Use the correct Java syntax for extending a class. Write expressions that upcast or downcast a reference (no tricks, no arrays).	5	49	14	Add a question Beta questions
Object 2 questions Know that java.lang.Object is the ultimate ancestor. Identify methods inherited from the Object class. Write correct implementation of the toString() method.	4	22	9	Add a question Beta questions
Overriding 2 questions Explain the overriding mechanism and late binding From given code including a late binding call, predict the method that will be called. Identify correct overriding syntax, distinguish between the overriding and overloading mechanism.	3	48	8	Add a question Beta questions
Abstract 2 questions Write code that declares abstract classes and methods Understand that an abstract class cannot be instantiated Know that once a class contains an abstract method, it must be marked as abstract.	7	28	10	Add a question Beta questions
Interfaces 2 questions Write code that declares an interface and its containing methods. Make a class implement an interface correctly. Explain the particular nature of attributes declared in interfaces. Identify differences between implementing an interface and extending a class. Know that all methods of an interface are public.	6	49	6	Add a question Beta questions
instanceof 2 questions Write code that uses the instanceof operator for run-time type identification. Identify correct operands of the instanceof operator	17	1	12	Add a question Beta questions
Access modifiers 2 questions From a given situation, predict if a method can access a class attributes/methods, whatever of the 4 access modifiers are applied on these attributes/methods. Select the appropriate access modifier to enable a class to access or not access an attribute/method.	7	19	4	Add a question Beta questions
Overloading 2 questions Implement constructor an method overloading correctly. Know that two methods cannot differ only on the return type.	2	14	13	Add a question Beta questions
Annotation 2 questions Use the @Override annotation	2	23	9	Add a question Beta questions