Solution:Step 1: Understand class variable usagepi is a class variable accessed as Circle.pi, which is valid.Step 2: Calculate circumferenceFormula: 2 * 3.14 * 5 = 31.4 (floating point may show slight difference).Final Answer:31.400000000000002 because pi is a class variable used in calculation ->

[Solved] Consider this class:class Circle: pi = 3.14 def __init__(self, radius): self.radius = radius def circumference(self): return 2 * Circle.pi * self.radius c = Circle(5) print(c.... | Python

Python - Classes and Object Lifecycle

Consider this class:

class Circle:
    pi = 3.14
    def __init__(self, radius):
        self.radius = radius
    def circumference(self):
        return 2 * Circle.pi * self.radius

c = Circle(5)
print(c.circumference())

What is the output and why?

A31.400000000000002 because pi is a class variable used in calculation

BError because pi should be accessed with self.pi

C10 because radius is multiplied by 2 only

DNone because circumference method does not return

Step-by-Step Solution

Solution:

Step 1: Understand class variable usage
pi is a class variable accessed as Circle.pi, which is valid.
Step 2: Calculate circumference
Formula: 2 * 3.14 * 5 = 31.4 (floating point may show slight difference).
Final Answer:
31.400000000000002 because pi is a class variable used in calculation -> Option A
Quick Check:
Class variables accessed via ClassName [OK]

Quick Trick: Access class vars with ClassName.var or self.var [OK]

Common Mistakes:

MISTAKES

Expecting error accessing class variable
Ignoring floating point precision
Forgetting to return value in method

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More Python Quizzes

Consider this class:

Step 1: Understand class variable usage

Step 2: Calculate circumference

Final Answer:

Quick Check:

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