[Solved] What will be the output of this code?class Test: def __init__(self): self.__val = 5 t = Test() print(hasattr(t, '__val')) print(hasattr(t, '_Test__val')) | Python

Python - Encapsulation and Data Protection

What will be the output of this code?

class Test:
    def __init__(self):
        self.__val = 5

t = Test()
print(hasattr(t, '__val'))
print(hasattr(t, '_Test__val'))

AFalse\nTrue

BFalse\nFalse

CTrue\nFalse

DTrue\nTrue

Step-by-Step Solution

Solution:

Step 1: Check attribute names
__val is mangled to _Test__val internally.
Step 2: Check hasattr results
t does not have '__val' attribute, so False; but has '_Test__val', so True.
Final Answer:
False\nTrue -> Option A
Quick Check:
hasattr('__val')=False, hasattr('_Test__val')=True [OK]

Quick Trick: hasattr('__attr') is False; use mangled name to check [OK]

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