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Programming and Software Development
Quick questions on Object-oriented programming explained: H2 Computing
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is encapsulation?Show answer
Encapsulation bundles data with the methods that use it and hides the internal data behind those methods. In Python a leading double underscore marks an attribute as private:
What is inheritance?Show answer
Inheritance lets a subclass acquire a parent class's attributes and methods, then add or override behaviour:
What is polymorphism?Show answer
Polymorphism lets objects of different classes be used through a common interface, each responding to the same call in its own way:
What is not calling the constructor correctly?Show answer
Creating an object runs __init__; missing required arguments raises an error, and attributes set there must exist before methods use them.
What is q1?Show answer
Distinguish between a class and an object. [2 marks]
What is q2?Show answer
How does encapsulation protect an object's data? [2 marks]
What is q3?Show answer
What does it mean to override a method in a subclass? [1 mark]
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