Explanation:HDFS tolerates failures of storage servers (called DataNodes) and its disks. 10. The HDFS file system is temporarily unavailable whenever the HDFS ________ is down.
A. DataNode
B. NameNode
C. ActionNode
D. None of the mentioned
Answer:A
Explanation:HDFS tolerates failures of storage servers (called DataNodes) and its disks. 10. The HDFS file system is temporarily unavailable whenever the HDFS ________ is down.
A. DataNode B. NameNode C. ActionNode D. None of the mentioned
Explanation:When the HDFS NameNode is restarted it recovers its metadata. Sanfoundry Global Education & Learning Series – Hadoop.