Quick study sessions to strengthen memory and retain key concepts.
What's a design issue with setting mutable fields directly in constructors?
It can lead to unintended side effects if the object is externally modified. Directly assigning a mutable object…
View Card →What happens if you forget to initialize a field in a constructor?
The field may have a default value or remain uninitialized. Forgetting to initialize a field can lead to…
View Card →Why might you use constructor parameters?
To initialize fields with specific values during object creation. Constructor parameters allow you to pass specific values to…
View Card →Why does a constructor matter in this design?
To initialize a new object's state. Frame the concept in practical terms so you can explain it during…
View Card →Why use 'super()' in a constructor?
To call a superclass constructor. Frame the concept in practical terms so you can explain it during interview…
View Card →What issue arises without a default constructor when others have parameters?
It prevents creating objects without parameters. If a class has only parameterized constructors, Java doesn't provide a default…
View Card →Why is 'this' keyword important in constructors?
It distinguishes class fields from parameters. The `this` keyword helps differentiate between class fields and parameters with the…
View Card →How does a private constructor affect a class design?
It restricts object creation, often used in singletons. A private constructor prevents external instantiation, allowing control over object…
View Card →Why should constructors avoid complex logic?
Complex logic can obscure initialization errors. Complex logic in constructors can hide initialization errors and make them harder…
View Card →Why does using 'this()' in a constructor change runtime behavior?
It calls another constructor in the same class. The `this()` keyword is used to call another constructor within…
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