What does the high availability of a name-node means? How is it accomplished?
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Why does one remove or add nodes in a Hadoop cluster frequently?
Explain the common input formats in hadoop?
What happen if one of the datanodes has much slower cpu?
What is a record reader?
How analysis of Big Data is useful for organizations?
What is the NameNode port number?
Define a record reader?
Explain what is speculative execution?
Give me examples of unstructured data?
If we want to copy 10 blocks from one machine to another, but another machine can copy only 8.5 blocks, can the blocks be broken at the time of replication?
How to do ‘map’ and ‘reduce’ works?
How is security achieved in Hadoop?
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