What is encapsulation?
Direct Answer
Specific question on one of the core OOPS principles.
Why Interviewers Ask This
Encapsulation is a fundamental concept in OOP. The interviewer wants to ensure the candidate understands how it protects data and enforces boundaries within classes. It is a basic but critical concept for writing secure and maintainable code.
How to Answer This Question
Define encapsulation as bundling data and methods that operate on that data within a single unit. Explain how access modifiers (private, public) restrict direct access to internal data. Provide a simple example, like a bank account class where balance is private. Highlight the benefit of data hiding.
Key Points to Cover
- Data and method bundling
- Access modifiers
- Data hiding
- Data integrity
Sample Answer
Encapsulation is the mechanism of wrapping data and methods that operate on that data into a single unit, typically a class. It restricts direct access to some of an object's components, preventing unintended interferenc…
Common Mistakes to Avoid
- Confusing with abstraction
- Failing to mention access modifiers
- No practical example provided
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