Comparison between Secondary NameNode and Checkpoint Node in Hadoop?
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Why aggregation cannot be done in Mapper?
How can we create a hadoop cluster from scratch?
How to do ‘map’ and ‘reduce’ works?
What is structured and unstructured data?
Name the operating system(s) which are supported for production hadoop deployment?
Clarify what is sequence file input format?
Why Hadoop performs replication, although it results in data redundancy?
What is data cleansing?
What is the logistic regression?
How namenode handles data node failures?
How would an hadoop administrator deploy various components of hadoop in production?
What do you think about the speculative execution?
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