Principles of Object-Oriented Design Quiz

Does the following code follow the Single Responsibility Principle? class Report { void generateReport() {} void printReport() {} void saveToFile() {} }

• Yes

• No

• Partially

• Depends on implementation

Does the following class violate the Open/Closed Principle? class Shape { double area(String type) { if (type.equals("circle")) {} else if (type.equals("square")) {} return 0; } }

• Yes

• No

• Not Sure

• Depends

Is the following design correct according to Liskov Substitution Principle? class Bird { void fly() {} } class Ostrich extends Bird { void fly() { throw new UnsupportedOperationException(); } }

• Yes

• No

• Depends

• Not Sure

Does the following code violate Interface Segregation Principle? interface Worker { void work(); void eat(); } class Robot implements Worker { public void work() {} public void eat() {} }

• Yes

• No

• Partially

• Not Sure

Does this follow Dependency Inversion Principle? class Light { } class Switch { Light light; void toggle() {} }

• No

• Yes

• Partially

• Depends

Does the following violate SRP? class UserManager { void createUser() {} void sendEmail() {} }

• Yes

• No

• Depends

• Not Sure

The following interface violates which principle? interface MultiFunctionDevice { void print(); void scan(); void fax(); }

• SRP

• LSP

• ISP

• DIP

True or False: A high-level module depending on a low-level module directly violates DIP.

• True

• False

• Depends

• Can't say

True or False: A subclass that throws an exception for a method from its superclass violates LSP.

• True

• False

• Depends

• Can't say

Does this code follow OCP? abstract class Shape { abstract double area(); } class Circle extends Shape { double area() { return 0; } } class Square extends Shape { double area() { return 0; } }

• Yes

• No

• Depends

• Not Sure