What is dependency injection? How to implement it? What is tightly coupled? What is loosely coupled?

Question

Accepted Answer

Dependency injection is a design pattern where the dependencies of an object are provided externally rather than created within the object itself.

Dependency injection helps in achieving loosely coupled code by allowing objects to be easily replaced or modified without changing the core logic.
It involves injecting dependencies into a class through constructor injection, setter injection, or interface injection.
Tightly coupled code refers to classes or components that are highly dependent on each other, making it difficult to change one without affecting the other.
Loosely coupled code refers to classes or components that are independent and can be easily replaced or modified without affecting other parts of the system.

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