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Java: Invariants and Validation

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What role does immutability play in maintaining invariants?

Immutability ensures the object's state cannot change after creation. Immutability prevents changes to an object's state, which is…

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Flashcard Study

Java: Invariants and Validation

Front

How does constructor validation enhance object integrity?

Constructor validation ensures an object starts in a valid state. By validating inputs in the constructor, you ensure…

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Flashcard Study

Java: Invariants and Validation

Front

Why is encapsulation crucial for maintaining object invariants?

Encapsulation hides internal state and ensures invariants are maintained. Encapsulation allows you to control access to an object's…

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Flashcard Study

Java: Invariants and Validation

Front

Why reject invalid stock quantities in e-commerce?

To prevent inventory errors. Frame the concept in practical terms so you can explain it during interview discussion.…

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Flashcard Study

Java: Invariants and Validation

Front

How does encapsulation distribute object responsibilities?

It defines clear interfaces for object interaction. Encapsulation allows objects to manage their own state and behavior by…

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Flashcard Study

Java: Invariants and Validation

Front

How would you explain a class invariant in an interview?

A condition that always holds true for objects. Class invariants are conditions that must remain true for an…

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Flashcard Study

Java: Invariants and Validation

Front

Why return a copy of a list in a getter method?

To protect the original list from external changes. Returning a copy of a list prevents external code from…

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Flashcard Study

Java: Invariants and Validation

Front

What are the trade-offs of using immutable objects?

Immutability can increase memory usage. Frame the concept in practical terms so you can explain it during interview…

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Flashcard Study

Java: Invariants and Validation

Front

Why are constructor validations important?

They ensure object correctness from creation. Constructor validations check the initial values assigned to an object's fields, guaranteeing…

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Flashcard Study

Java: Invariants and Validation

Front

How does method validation reinforce encapsulation?

It ensures only valid operations are allowed. Method validation checks the inputs and conditions before performing operations, thus…

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