How will you make changes to the default configuration files?
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What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
What's the best way to copy files between HDFS clusters?
What is the problem with small files in Apache Hadoop?
How is security achieved in Apache Hadoop?
What if a namenode has no data?
Explain the core components of hadoop?
What is a spill factor with respect to the ram?
Suppose Hadoop spawned 100 tasks for a job and one of the task failed. What will Hadoop do?
What is Hadoop?
Explain the Job OutputFormat?
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