Core Java – Page 40 – Sharp: NCLEX, Java & Python

Java: Code Reading and State Safety

How would you explain a common mistake when exposing collections in a class in an interview?

What does encapsulation achieve in object-oriented design?

Why is it problematic to mix public fields and methods in a class?

How can a developer refactor a class to improve encapsulation?

What are compile-safe but runtime-unsafe designs?

How can exposing mutable static fields be problematic?

What is immutability in Java?

How would you explain a safer approach to handle mutable collections in a class in an interview?

Why is using setters cautiously important?

Why does private fields in a class matter in practice?