What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?
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What is the function of NodeManager?
Explain InputFormat?
What is the function of ApplicationMaster?
How indexing is done in HDFS?
What is DistributedCache and its purpose?
What is HDFS ? How it is different from traditional file systems?
Explain the difference between gen1 and gen2 hadoop with regards to the namenode?
What do you mean by taskinstance?
What is HDFS Block size? How is it different from traditional file system block size?
Define a daemon?
What is InputSplit and RecordReader?
How can we look for the namenode in the browser?
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