What happens if you don?t override the mapper methods and keep them as it is?
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What are the Hadoop features extended to its eco-system components ?
Is it possible to rename the output file, and if so, how?
While starting hadoop services, datanode service is not running?
What is the default replication factor in Hadoop and how will you change it?
What does the mapred.job.tracker command do?
What is check pointing in hadoop?
How Hadoop is cost-effective?
Ideally what should be the replication factor in hadoop?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
Name the files which are used by the startup and shutdown commands?
If datanodes increase, then do we need to upgrade namenode?
What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?
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