If the IP address or hostname of a data node changes – McqOptions

MCQOPTIONS

1.	If the IP address or hostname of a data node changes
A.	The namenode updates the mapping between file name and block name
B.	The data in that data node is lost forever
C.	The namenode need not update mapping between file name and block name
D.	There namenode has to be restarted
Answer» D. There namenode has to be restarted

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