What is a rack?
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What do you think about the speculative execution?
Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?
What does rack awareness algorithm means?
What is the key difference between NameNode and DataNode in Hadoop?
What is the job tracker role in hadoop?
Give me an example of document database ?
How can we create a hadoop cluster from scratch?
What is difference between secondary namenode, checkpoint namenode & backupnode?
Clarify how ordering in hdfs is finished?
What does hadoop-env.sh do?
How can you native libraries be included in yarn jobs?
What is the role of the namenode?
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