M Mr. Dubey 🎓 Coach ⭐ 102.92K Points 📊 Hadoop Q. What does HDFS do when a DataNode fails? (A) Shuts down the system (B) Replaces the DataNode immediately (C) Replicates data blocks from failed node (D) Deletes the associated files 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) Replicates data blocks from failed node Explanation: HDFS replicates the blocks of the failed DataNode to other healthy DataNodes to maintain replication factor.