Define speculative execution?
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What do you mean by data locality?
For a Hadoop job, how will you write a custom partitioner?
Define the purpose of the partition function in mapreduce framework
Mention Hadoop core components?
What is the relationship between Job and Task in Hadoop?
what is storage and compute nodes?
What is MapReduce?
What are the various configuration parameters required to run a mapreduce job?
What are the four essential parameters of a mapper?
how can you check whether Namenode is working beside using the jps command?
Explain what does the conf.setmapper class do?
how indexing in HDFS is done?
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