Questions
7 of 13
Can an Interface inherit from another Interface?
Difficulty: 2/10
Interface Inheritance
Yes. Interfaces can extend other interfaces. This allows a more specialized contract to inherit the operations of a broader contract. A class implementing the child interface must satisfy the inherited contract as well as the child's additional requirements. Both Java and C# support interface inheritance, and Java/C# also allow an interface to inherit from multiple interfaces.
javascript
- 1
Interfaces can extend other interfaces.
- 2
A child interface inherits the parent's contract.
- 3
Multiple interface inheritance is supported in Java and C#.
- 4
A concrete implementing class must satisfy the resulting contract.
- 5
Interface inheritance should represent a genuine capability specialization.
Follow-up Questions
- Can an interface extend multiple interfaces?
- Can a class implement multiple interfaces?
- What happens if parent interfaces contain conflicting defaults?
- What is interface segregation?