Quick Answer
Default methods in interfaces provide a default implementation - existing implementing classes don't need to add it. Enables interface evolution without breaking backward compatibility. Static methods in interfaces are utility methods tied to the interface (like Collections methods for Collection). Used heavily in Java 8 to add Stream/Lambda support to existing collection interfaces without breaking code.
Answer
Default methods provide implementation inside interfaces. Static methods belong to the interface and cannot be overridden. Enhance flexibility and backward compatibility.
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Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
