M Mr. Dubey 🎓 Coach ⭐ 102.92K Points 📊 Hadoop Q. What is the main responsibility of a DataNode? (A) Store metadata (B) Execute MapReduce jobs (C) Store and retrieve actual data blocks (D) Monitor YARN jobs 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) Store and retrieve actual data blocks Explanation: DataNodes handle the actual storage and retrieval of data blocks in HDFS.