What could be a potential downside of excessively applying the Interface Segregation Principle?
It makes the code more difficult to unit test.
It reduces code reusability.
It can lead to a higher number of interfaces, potentially increasing code complexity.
It violates the principles of object-oriented programming.
Which of these is NOT a potential consequence of violating the Liskov Substitution Principle?
Higher likelihood of introducing bugs when extending or modifying code.
Increased code complexity and reduced readability.
Decreased code reusability as subclasses may not behave as expected.
Improved performance due to optimized subclass implementations.
How does SRP contribute to creating loosely coupled classes?
By making classes dependent on each other for core functionalities.
By encouraging classes to have multiple responsibilities for better interaction.
By promoting the use of global variables for shared data access.
By reducing the points of interaction between classes as they have focused roles.
In the context of the Open/Closed Principle, what does 'open for extension' mean?
Code should be heavily commented to explain every detail.
A class's behavior should be modifiable through inheritance or polymorphism.
All classes should be loosely coupled and easily replaceable.
The source code of a class should always be accessible for any developer to modify.
What is the primary purpose of the Open/Closed Principle?
To enforce the use of abstract classes
To prevent modification of existing code
To allow extending functionality without altering existing code
To ensure all methods are open for modification
Imagine a class named 'Employee' that handles both employee data (like name, ID) and database operations. What SOLID principle does this violate?
Liskov Substitution Principle
Single Responsibility Principle
Interface Segregation Principle
Open/Closed Principle
Which of these is NOT a valid approach to refactor a class violating SRP?
Use design patterns like Strategy or Template Method to separate concerns.
Delegate responsibilities to other existing classes.
Extract separate functionalities into new classes.
Combine all the responsibilities into a single method for better cohesion.
Which of these is a benefit of adhering to the Single Responsibility Principle?
Tighter coupling between classes for better collaboration.
More complex class design for handling multiple tasks.
Increased class size for better code organization.
Reduced code duplication and improved reusability.
Which of these scenarios indicates a violation of the Interface Segregation Principle?
A single interface defines methods for both printing and saving a document.
An interface is used to abstract the creation of objects.
A class implements multiple interfaces to achieve polymorphism.
A class inherits from an abstract base class and overrides its methods.
What is the core idea behind the Interface Segregation Principle (ISP)?
Clients should not be forced to depend on methods they don't use.
Code should be open for extension but closed for modification.
Subclasses should be substitutable for their base classes.
Classes should have only one responsibility.