🔥 What is a Marker Interface in Java? | Java Interview Question

Описание: What is a marker interface in Java? 🤔
A marker interface is an interface with no methods, used only to tag or mark a class for special treatment by JVM or frameworks. 🚀

For example, Serializable marks a class so its objects can be saved or transferred.
Marker interfaces don’t add behavior — they just act as tags for classes!


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