What is the difference between the Liskov Substitution Principle and the Interface Segregation Principle?

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Accepted Answer

Liskov Substitution Principle focuses on inheritance while Interface Segregation Principle focuses on interfaces.

Liskov Substitution Principle states that objects of a superclass should be replaceable with objects of its subclasses without affecting the program's correctness.
Interface Segregation Principle states that a client should not be forced to implement interfaces they do not use.
Liskov Substitution Principle is related to inheritance hierarchy, while Interface Segregation Principle is related to interfaces and their usage.
Example of Liskov Substitution Principle: If a class Animal has a method eat(), then all subclasses like Dog, Cat, etc. should also have the eat() method.
Example of Interface Segregation Principle: Instead of having a single interface with multiple methods, create smaller interfaces with specific methods for different clients.

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