M Mr. Dubey 🎓 Coach ⭐ 104.60K Points 📊 Hadoop Q. Which interface is used to define Mapper logic? (A) Reducer (B) Mapper (C) Driver (D) InputFormat 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) Mapper Explanation: Mapper interface is used to define map logic.