midOOP
What is the Dependency Inversion Principle (DIP)?
Updated May 17, 2026
Short answer
High-level modules should depend on abstractions, not concrete implementations.
Deep explanation
DIP decouples system layers by introducing abstractions like interfaces, making systems easier to test and extend.
Real-world example
Using repository interfaces instead of direct database calls.
Common mistakes
- Direct dependency on concrete classes.
Follow-up questions
- How does DIP improve testing?
- Is DIP related to DI?