Explain the features of stand alone (local) mode?
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What is speculative execution in Hadoop?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is crontab? Explain with suitable example?
What do you know about sequencefileinputformat?
What problems have you faced when you are working on Hadoop code?
What is HDFS block size and what did you chose in your project?
Explain the benefits of block transfer?
How does a namenode handle the failure of the data nodes?
How can you overwrite the replication factors in HDFS?
Can the balancer be run while Hadoop is in use?
What is Hadoop?
Explain the difference between NameNode
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