Does Hadoop requires RAID?
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Explain how do ‘map’ and ‘reduce’ works?
How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
How can we look for the namenode in the browser?
What is compute and Storage nodes?
What if rack 2 and datanode fails?
What is speculative execution in Hadoop?
What is the best hardware configuration to run Hadoop?
What are different types of filesystem?
What are the limitations of importing RDBMS tables into Hcatalog directly?
What are different hdfs dfs shell commands to perform copy operation?
What is the default block size in Hadoop 1 and in Hadoop 2? Can it be changed?
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