Q. What is a heartbeat in Hadoop?

  • (A) Signal sent from NameNode to DataNode
  • (B) Health check signal sent from DataNode to NameNode
  • (C) Data packet from reducer
  • (D) Job status update
💬 Discuss
✅ Correct Answer: (B) Health check signal sent from DataNode to NameNode
Explanation: DataNodes send heartbeats to NameNode regularly to confirm they are alive.

Published by Mr. Dubey ⭐ 111.54K Points at 13-Jun-2025 07:31 am in Hadoop

Explanation by: Mr. Dubey
DataNodes send heartbeats to NameNode regularly to confirm they are alive.

💬 Discussion

📊 Question Analytics

👁️
86
Total Visits
📽️
1 y ago
Published
🎖️
Mr. Dubey
Publisher
📈
92%
Success Rate