R Ritu Singhal 🎓 Goal Maker ⭐ 4.36K Points 📊 Hadoop Q. We can declare the schema of our data either in a . . . . . . . . file. (A) JSON (B) XML (C) SQL (D) R 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) SQL