What does the `@dataclass` decorator automatically generate for a class?

`__str__` and `__copy__` methods

`__hash__` and `__lt__` methods for all fields

`__del__` and `__enter__` methods for resource management

`__init__`, `__repr__`, and `__eq__` methods based on the class annotations

A data class Employee has fields employee_id (int) and name (str). The analyst wants to sort a list of Employee objects by employee_id in ascending order. Which implementation is correct?

Implement __eq__ to compare employee_id, and use sorted(employees).

Use sorted(employees, key=lambda e: e.name).

Implement __lt__ to compare employee_id, and use sorted(employees).

Use sorted(employees) without any custom methods.

What does the built-in `id()` function return for an object?

The memory address of the object

The string representation of the object

What is the purpose of implementing `__repr__` in a class?

To provide a user-friendly string representation for display

To provide an unambiguous string representation of the object, often used for debugging

To define how the object is hashed

To define how the object is compared for equality

Python InstitutePCAD - Certified Associate in Data Analytics with Python

Domain 2Objective 3

Object-Oriented Programming for Data Modeling PCAD-31 Practice Questions (Page 3)

Part of the Programming and Database Skills domain, which accounts for 33.3% of the PCAD-31 exam. Python Institute does not publish an official question count, but from its 60-minute exam (~25–40 total, ~8–8 in this domain), expect 2–2 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

12concepts

33.3%of the exam

Questions 11–15

11foundation · easy
What does the `@dataclass` decorator automatically generate for a class?
Select an answer first
12foundation · easy
Which method is called when an object is about to be destroyed (garbage collected)?
Select an answer first
13application · medium
A data class Employee has fields employee_id (int) and name (str). The analyst wants to sort a list of Employee objects by employee_id in ascending order. Which implementation is correct?
Select an answer first
14foundation · easy
What does the built-in `id()` function return for an object?
Select an answer first
15foundation · easy
What is the purpose of implementing `__repr__` in a class?
Select an answer first

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Object-Oriented Programming for Data Modeling PCAD-31 Practice Questions (Page 3)

Questions 11–15

What does the `@dataclass` decorator automatically generate for a class?

Which method is called when an object is about to be destroyed (garbage collected)?

A data class Employee has fields employee_id (int) and name (str). The analyst wants to sort a list of Employee objects by employee_id in ascending order. Which implementation is correct?

What does the built-in `id()` function return for an object?

What is the purpose of implementing `__repr__` in a class?

Keep studying — Programming and Database Skills

What is the purpose of implementing `repr` in a class?