• What is the difference between ref, out, and in parameters in C#?
• Explain the differences between abstract classes and interfaces.
• How does garbage collection work in .NET?
• What are value types vs reference types?
• What is boxing and unboxing?
• Can you explain the SOLID principles?
• What is polymorphism, and how is it implemented in C#?
• How would you use dependency injection in a C# application?
• What is the purpose of the sealed keyword?
• How does inheritance differ from composition?

Question

•	What is the difference between ref, out, and in parameters in C#?
	•	Explain the differences between abstract classes and interfaces.
	•	How does garbage collection work in .NET?
	•	What are value types vs reference types?
	•	What is boxing and unboxing?
•	Can you explain the SOLID principles?
	•	What is polymorphism, and how is it implemented in C#?
	•	How would you use dependency injection in a C# application?
	•	What is the purpose of the sealed keyword?
	•	How does inheritance differ from composition?

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