EMERGING TRENDS IN SOFTWARE ENGINEERING
CLOUD COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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____ is the slave/worker node and holds the user data in the form of Data Blocks.
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NameNode
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DataNode
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Data block
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Replication
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Explanation:
Detailed explanation-1: -DataNode is the slave/worker node and holds the user data in the form of Data Blocks. There can be any number of DataNodes in a Hadoop Cluster.
Detailed explanation-2: -DataNodes are the slave nodes in HDFS. The actual data is stored on DataNodes. A functional filesystem has more than one DataNode, with data replicated across them. On startup, a DataNode connects to the NameNode; spinning until that service comes up.
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