20+ practice questions focused on Object-Oriented Programming — one of the most tested topics on the Certified Associate Python Programmer PCAP exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Object-Oriented Programming PracticeA class 'Employee' has a method 'work()'. A subclass 'Manager' overrides 'work()' but also wants to call the parent's 'work()'. Which syntax correctly achieves this?
Explanation: In Python 3, super().work() is the recommended zero-argument form. super(Manager, self).work() is the older explicit form and still works correctly. Employee.work(self) directly calls the parent method and is also correct in single inheritance, though it bypasses the MRO. Since the question asks 'Which syntax correctly achieves this?' without restricting to 'best' or 'recommended', B, C, and D are all correct.
A Python program uses multiple inheritance. Class A defines method 'foo', class B also defines 'foo', and class C(A, B) inherits from both. The developer expects that calling 'foo' on an instance of C should invoke the method from class A. However, it invokes the method from class B. What is the most likely cause?
Explanation: Python's MRO uses C3 linearization and respects the base class order as written. For class C(A, B), the MRO is C→A→B, so A.foo is found first. If B.foo is invoked, the most likely cause is that the developer actually wrote C(B, A), reversing the base class order. The question's premise is inconsistent unless the order is reversed.
Which TWO of the following are valid ways to define a class attribute that is shared by all instances?
Explanation: Assigning an attribute directly to the class after its definition (MyClass.attr = 0) creates a class-level attribute that is shared by all instances. Option D is correct because defining an attribute directly inside the class body (attr = 0) also creates a class-level attribute, accessible to all instances unless shadowed by an instance attribute.
During code review, a team member wrote: 'class Dog(Animal): pass'. The Animal class has an __init__ method that requires a 'name' parameter. When instantiating Dog, what should be done to properly initialize the inherited attributes?
Explanation: In Python, when a subclass like Dog inherits from a superclass like Animal, the __init__ method is not automatically called unless explicitly invoked. Since Animal's __init__ requires a 'name' parameter, Dog must define its own __init__ and call super().__init__(name) to ensure the inherited attributes are properly initialized. This follows Python's method resolution order (MRO) and is the standard pattern for cooperative multiple inheritance.
A developer needs to create a class that cannot be instantiated directly but serves as a base for other classes. Which approach should be used?
Explanation: The correct approach is to use the abc module. Defining the class with ABCMeta and decorating at least one method with @abstractmethod makes the class abstract, preventing direct instantiation until a subclass overrides all abstract methods. This is the recommended way to create abstract base classes in Python. Raising NotImplementedError in __init__ is a common but less robust pattern and is not considered best practice for defining an abstract base class.
+15 more Object-Oriented Programming questions available
Practice all Object-Oriented Programming questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Object-Oriented Programming. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Object-Oriented Programming questions on the PCAP frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Object-Oriented Programming is tested as part of the Certified Associate Python Programmer PCAP blueprint. Practicing with targeted Object-Oriented Programming questions ensures you can handle any format or difficulty that appears.
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