[Solved] What will be the output of this code?class Car: def __init__(self): self.__speed = 0 def set_speed(self, speed): self.__speed = speed def get_speed(self): return self.__speed car = Car() car.... | Python

Python - Encapsulation and Data Protection

What will be the output of this code?

class Car:
    def __init__(self):
        self.__speed = 0
    def set_speed(self, speed):
        self.__speed = speed
    def get_speed(self):
        return self.__speed

car = Car()
car.set_speed(50)
print(car.get_speed())

ANone

B0

CError: AttributeError

D50

Step-by-Step Solution

Solution:

Step 1: Understand private variable usage
The variable __speed is private but accessible inside class methods.
Step 2: Trace method calls and output
set_speed sets __speed to 50, get_speed returns 50, so print outputs 50.
Final Answer:
50 -> Option D
Quick Check:
Private variable accessed via methods = 50 [OK]

Quick Trick: Use getter/setter to access private variables [OK]

Common Mistakes:

MISTAKES

Expecting direct access to __speed outside class
Thinking private variables cannot be changed
Confusing initial value with updated value

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What will be the output of this code?

Step 1: Understand private variable usage

Step 2: Trace method calls and output

Final Answer:

Quick Check:

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