Answer
Abstract class: Can contain both implementation and abstraction.
Interface: Defines only the contract with no implementation (in traditional C#).
A class can inherit one abstract class but implement multiple interfaces.
Quick Answer
Abstract class: can have implementation, fields, and constructors — a class can inherit only one. Interface: defines only a contract with no implementation (historically) — a class can implement many. Use abstract class for shared behavior. Use interface for capabilities that unrelated types can share.
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SugharaIQ Editorial Team
Verified Answer
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Source: SugharaIQ