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What is the main purpose of using private attributes (starting with __) in a Python class?

easy📝 Conceptual Q11 of 15
Python - Encapsulation and Data Protection
What is the main purpose of using private attributes (starting with __) in a Python class?
ATo speed up the program execution
BTo hide the attribute from outside the class and protect it
CTo make the attribute accessible everywhere
DTo make the attribute a global variable
Step-by-Step Solution
Solution:

  1. Step 1: Understand private attribute naming

    Private attributes start with double underscores to hide them from outside access.

  2. Step 2: Purpose of hiding attributes

    This protects the data inside the object from accidental or unauthorized changes.

  3. Final Answer:

    To hide the attribute from outside the class and protect it -> Option B

  4. Quick Check:

    Private attributes = data protection [OK]
Quick Trick: Private attributes start with __ to hide data inside class [OK]
Common Mistakes:
  • Thinking private means accessible everywhere
  • Confusing private with global variables
  • Believing private speeds up code

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