A class `Config` defines a class variable `__api_key = 'abc123'`. A developer tries to access it from outside the class as `Config.__api_key`. What is the result?

The string 'abc123' is returned because class variables are always public

AttributeError; the value cannot be accessed from outside the class under any circumstances

The string 'abc123' is returned, but only if the class has no instance variables

AttributeError; the correct external reference is `Config._Config__api_key`

A developer writes: `class Counter: count = 0; def __init__(self): self.count = 5`. After creating `c = Counter()`, what is the value of `c.count` and `Counter.count`?

Both are 5 because the instance assignment updates the class variable

Both are 0 because instance variables cannot shadow class variables

`c.count` is 5 and `Counter.count` is 0

`c.count` is 0 and `Counter.count` is 5

Where should a class variable be declared in a class definition?

At the class level, outside any methods

In the global scope of the module

Inside the __init__ method using self

Given the class below, what will be the output of the code? class Dog: species = 'Canis familiaris' def bark(self): return 'Woof' print(Dog.__dict__.keys())

dict_keys(['__module__', 'species', 'bark', '__dict__', '__weakref__', '__doc__'])

Python InstitutePCAP - Certified Associate Python Programmer

Domain 4Objective 2

PCAP-31-03 4.2 Employ Class and Object Properties PCAP-31 Practice Questions (Page 1)

Part of the Object-Oriented Programming domain, which accounts for 34% of the PCAP-31 exam. Python Institute does not publish an official question count, but from its 65-minute exam (~25–45 total, ~9–15 in this domain), expect 2–3 from this objective — we provide 21 practice questions to prepare you well beyond it. (estimate)

21questions here

5free pages

8concepts

34%of the exam

Questions 1–5

1application · medium
A class `Config` defines a class variable `__api_key = 'abc123'`. A developer tries to access it from outside the class as `Config.__api_key`. What is the result?
Select an answer first
2application · medium
A developer writes: `class Counter: count = 0; def __init__(self): self.count = 5`. After creating `c = Counter()`, what is the value of `c.count` and `Counter.count`?
Select an answer first
3foundation · easy
Where should a class variable be declared in a class definition?
Select an answer first
4foundation · easy
Given the class below, what will be the output of the code? class Dog: species = 'Canis familiaris' def bark(self): return 'Woof' print(Dog.__dict__.keys())
Select an answer first
5application · medium
A developer is debugging a class and wants to see exactly which instance variables exist on a particular object, excluding class-level attributes. Which expression returns a dictionary containing only the instance variables and their current values?
Select an answer first

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PCAP-31-03 4.2 Employ Class and Object Properties PCAP-31 Practice Questions (Page 1)

Questions 1–5

A class `Config` defines a class variable `__api_key = 'abc123'`. A developer tries to access it from outside the class as `Config.__api_key`. What is the result?

A developer writes: `class Counter: count = 0; def init(self): self.count = 5`. After creating `c = Counter()`, what is the value of `c.count` and `Counter.count`?

Where should a class variable be declared in a class definition?

Given the class below, what will be the output of the code? class Dog: species = 'Canis familiaris' def bark(self): return 'Woof' print(Dog.dict.keys())

A developer is debugging a class and wants to see exactly which instance variables exist on a particular object, excluding class-level attributes. Which expression returns a dictionary containing only the instance variables and their current values?

PCAP-31-03 4.2 Employ Class and Object Properties PCAP-31 Practice Questions (Page 1)

Questions 1–5

A class `Config` defines a class variable `__api_key = 'abc123'`. A developer tries to access it from outside the class as `Config.__api_key`. What is the result?

A developer writes: `class Counter: count = 0; def __init__(self): self.count = 5`. After creating `c = Counter()`, what is the value of `c.count` and `Counter.count`?

Where should a class variable be declared in a class definition?

Given the class below, what will be the output of the code? class Dog: species = 'Canis familiaris' def bark(self): return 'Woof' print(Dog.__dict__.keys())

A developer is debugging a class and wants to see exactly which instance variables exist on a particular object, excluding class-level attributes. Which expression returns a dictionary containing only the instance variables and their current values?

Keep studying — Object-Oriented Programming

A developer writes: `class Counter: count = 0; def init(self): self.count = 5`. After creating `c = Counter()`, what is the value of `c.count` and `Counter.count`?

Given the class below, what will be the output of the code? class Dog: species = 'Canis familiaris' def bark(self): return 'Woof' print(Dog.dict.keys())