What is data cleansing?
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What are the restriction to the key and value class ?
What is NameNode? How NameNode tackle Datanode failures in Hadoop?
According to IBM, what are the three characteristics of Big Data?
How can you set an arbitrary number of Reducers to be created for a job in Hadoop?
When we send a data to a node, do we allow settling in time, before sending another data to that node?
What is Slot in Hadoop v1? Why was it removed from Hadoop v2?
How to do ‘map’ and ‘reduce’ works?
What is the job tracker role in hadoop?
What happen when namenode enters in safemode in hadoop?
Is hadoop still in demand?
How often DataNode send heartbeat to NameNode in Hadoop?
Why aggregation cannot be done in Mapper?
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