Why are the number of splits equal to the number of maps?
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What if a namenode has no data?
What do sorting do?
Why do we use HDFS for applications having large data sets and not when there are lot of small files?
What is a Record Reader in hadoop?
Explain how do ‘map’ and ‘reduce’ works?
What is the best hardware configuration to run Hadoop?
On what basis data will be stored on a rack?
Does this lead to security issues?
What are the main components of a Hadoop Application?
What are the two main components of ResourceManager?
Does Hadoop requires RAID?
What is the difference between Apache Hadoop and RDBMS?
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