You are the hadoop fs –put command to add a file “sales.txt” to HDFS. This file is small
enough that it fits into a single block, which is replicated to three nodes in your cluster (with
a replication factor of 3). One of the nodes holding this file (a single block) fails. How will the
cluster handle the replication of this file in this situation/

A.
This file will be immediately re-replicated and all other HDFS operations on the cluster
will halt until the cluster’s replication values are restored

B.
The file will remain under-replicated until the administrator brings that nodes back online

C.
The file will be re-replicated automatically after the NameNode determines it is under
replicated based on the block reports it receives from the DataNodes

D.
The cluster will re-replicate the file the next time the system administrator reboots the
NameNode daemon (as long as the file’s replication doesn’t fall two)