0 votes
1 view
in Big Data Hadoop & Spark by (31.7k points)

A - Maintain the file system tree and metadata for all files and directories.

B - None of the options is correct.

C - Control the execution of an individual map task or a reduce task.

D - Store and retrieve blocks when told to by clients or the NameNode.

E - Manage the file system namespace.

1 Answer

0 votes
by (64.7k points)

The correct answer is option D (store and retrieve blocks when told by clients or the name node). Because the DataNode acts as a slave in Hadoop Cluster whereas NameNode acts as a Master. DataNode stores the business data, creating, replicating, deleting, retrieving data blocks as per the instructions of Master (NameNode).

If you wish to learn Hadoop from top experts, I suggest this Hadoop Training course by Intellipaat.

You can watch this video to understand the in-detail of HDFS:

Welcome to Intellipaat Community. Get your technical queries answered by top developers !


Categories

...