What are the modes in which Apache Hadoop run?
What are the characteristics of hadoop framework?
Mention what are the data components used by Hadoop?
What other technologies have you used in hadoop sta ck?
Why we cannot do aggregation (addition) in a mapper? Why we require reducer for that?
What is NoSQL?
Can we have multiple entries in the master files?
What is HDFS - Hadoop Distributed File System?
On What concept the Hadoop framework works?
What is HDFS ? How it is different from traditional file systems?
What mechanism does hadoop framework provides to synchronize changes made in distribution cache during runtime of the application?
What is the main purpose of HDFS fsck command?
Explain the difference between NameNode