Explain what is namenode in hadoop?
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List out the different stream grouping in apache storm?
Define data cleansing?
what happens when namenode goes down during file read operation in hadoop?
How is the splitting of file invoked in Hadoop framework?
How namenode handles data node failures?
After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?
What are the tools used in big data?
What happens in text format?
Explain what is namenode in hadoop?
According to IBM, what are the three characteristics of Big Data?
Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?
What are 'slaves' and 'masters' in Hadoop?
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