Design Patterns · Junior · Question 63 of 75

What is encapsulation?

✓Correct answer: Hiding internal details behind a public interface, so users depend only on what's exposed
2Wrapping every function in a class
3Compressing code for production

Explanation

Private fields (#count), module-private functions and closures let internals change without breaking callers.

Further reading

Wikipedia: Encapsulation ↗

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