Quick study sessions to strengthen memory and retain key concepts.
Why can not enforcing invariants become a real problem?
It leads to inconsistent object states. Frame the concept in practical terms so you can explain it during…
View Card →How does immutability maintain invariants?
Immutability prevents state changes after construction. Immutable objects cannot have their state modified after they are created, which…
View Card →Why use private fields in Java classes?
Private fields support encapsulation. Frame the concept in practical terms so you can explain it during interview discussion.…
View Card →How does encapsulation promote object responsibility?
Encapsulation defines clear responsibilities for each class. By encapsulating data and behavior within a class, encapsulation ensures that…
View Card →How do you ensure an object's state is always valid?
Use constructor and setter validations to enforce rules. To keep an object in a valid state, implement checks…
View Card →What are the consequences of not using encapsulation?
Lack of encapsulation can lead to unstable and insecure code. Without encapsulation, fields are exposed and easily modified,…
View Card →Why is input validation crucial in setters?
To ensure the object's state remains valid. Setters modify object fields, so validating inputs ensures the object remains…
View Card →Why does a getter method matter in this design?
Getter methods provide controlled access to class fields. Getter methods allow external classes to read private fields without…
View Card →How do invariants affect class design?
Invariants guide the structure and behavior of a class. Invariants dictate necessary conditions for maintaining object integrity, influencing…
View Card →Why use private fields in a class?
Private fields restrict direct access, enforcing encapsulation. Using private fields prevents external classes from changing the internal state…
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