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Which of the following are violations of LSP?
LSP violations symptoms
- Derivates that override a method of the base class method to give it completely new behaviour.
- Derivates that override a method of the superclass by an empty method.
- Derivates that document that certain methods inherited from the superclass should not be called by clients.
What violates Liskov Substitution Principle?
Liskov Substitution Principle is an extension of the Open Close Principle and is violated when you have written code that throws “not implemented exceptions” or you hide methods in a derived class that have been marked as virtual in the base class.
Are overriding methods bad?
Yes, in general, overriding concrete methods is a code smell. Because the base method has a behavior associated with it that developers usually respect, changing that will lead to bugs when your implementation does something different.
What are the restrictions when overriding a method?
Answer: Overriding methods must have the same name, parameter list, and same return type. i.e., they must have the exact signature of the method we are going to override, including return type. The overriding method cannot be less visible than the method it overrides.
Why is LSP important?
The Liskov Substitution Principle (LSP) states that an instance of a parent class should be replaceable with an instance of a child class without the user knowing the difference or incurring any negative side effects. The LSP guides how inheritance is implemented in the application’s design.
What is LSP in programming?
The Language Server Protocol (LSP) is an open, JSON-RPC-based protocol for use between source code editors or integrated development environments (IDEs) and servers that provide programming language-specific features.
What is LSP in OOP?
The Liskov Substitution Principle (LSP, lsp) is a concept in Object Oriented Programming that states: Functions that use pointers or references to base classes must be able to use objects of derived classes without knowing it.