Chapter 11: Classes & Instances (Review Questions)¶

The questions below assume that you have read the first , second , third , and fourth part of Chapter 11.

Be concise in your answers! Most questions can be answered in one sentence.

Essay Questions¶

Q1: How are classes a way to manage the state in a big program? How should we think of classes conceptually?

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Q2: What do we mean with instantiation? How do instances relate to classes?

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Q3: What is an implementation detail? Name two different examples of implementation details regarding the Vector and Matrix classes!

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Q4: How are instance methods different from class methods? How do special methods fit into the picture?

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Q5: How do mutability and immutability come into play when designing a user-defined data type?

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Q6: Explain the concept of method chaining!

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Q7: How can we implement operator overloading for a user-defined data type? When do we need to user reverse special methods?

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True / False Questions¶

Motivate your answer with one short sentence!

Q8: An instance's text representation is a bytes object with a special encoding.

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Q9: Computed properties are special kinds of instance methods.

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Q10: Sequence emulation means designing a user-defined data type around the built-in list or tuple types.

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Q11: The Python Data Model can be regarded as the "Theory" or "Mental Model" behind the Python language.

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Q12: Polymorphism means that two instances have the same data type, be it a built-in or user-defined one.

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Q13: Number emulation means that two instances of the same user-defined data type can be added together.

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Q14: Packages are a good place to collect all the code to be reused in a data science project, for example, across different Jupyter notebooks.

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