Complete Java SE 8 Developer Bootcamp - Benefits of Polymorphism

The video tutorial discusses the development of an accounting system by a large software team, focusing on the employee hierarchy and the use of polymorphism. It explains how different employee types like managers, instructors, and programmers are handled through method overriding. The tutorial highlights the importance of consistent method interfaces and the flexibility offered by polymorphism, allowing changes to be made in one place without affecting the entire system. It also addresses potential errors and the benefits of future-proofing the application.

What is the primary reason for using method overriding in the employee hierarchy?

• To make the system more complex

• To simplify the code by using a single method for all employees

• To allow different employee types to have unique payment calculations

• To ensure all employees have the same salary

How does polymorphism benefit the pay service class?

• It restricts the class to a single payment method

• It makes the class dependent on specific employee types

• It enables the class to process payments for any employee subtype

• It allows the class to handle only one type of employee

What is the role of the pay service class in the system?

• To calculate and process employee payments

• To manage employee promotions

• To train employees

• To hire new employees

What could happen if an employee subclass does not correctly override the pay method?

• The system will crash

• The employee might receive a payment of $0

• The pay service will skip that employee

• The system will automatically assign a default salary

What is a key advantage of using polymorphism in software development?

• It makes the code harder to understand

• It limits the flexibility of the system

• It requires more code to be written

• It allows for easy integration of new employee types

Why is it important to isolate code changes in software development?

• To make the code more complex

• To increase the number of bugs

• To minimize the risk of introducing bugs

• To ensure changes affect the entire system

How can a new employee type be added to the system?

• By changing the existing employee classes

• By creating a new subclass and overriding the pay method

• By rewriting the entire system

• By modifying the pay service class