How do you avoid tight coupling in large .NET projects?
Answer: Use interfaces and abstractions (DIP). Apply Dependency Injection. Modularize code into bounded contexts or separate projects. Use events or messaging for decoupled communication. Avoid static state and global variables.
What interviewers expect
- A clear definition tied to SOLID in Design Patterns & SOLID projects
- Trade-offs (performance, maintainability, security, cost)
- When you would and would not use it in production
Real-world example
In a production Design Patterns & SOLID application, teams apply this when handling user-facing features or integration boundaries. For example, you might use it during a sprint where reliability and observability matter—logging metrics, validating edge cases, and documenting the decision in an ADR so future developers understand why the approach was chosen.
How to explain in the interview
- Define the concept in one or two sentences.
- Context — where it fits in Design Patterns & SOLID architecture.
- Example — a specific project, bug, or performance win.
- Trade-off — what you gain vs what you sacrifice.
Tip: Practice aloud on Toolliyo mock interview or the Interview Q&A section before your real interview.