Rack awareness of Namenode?
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What problems can be addressed by using Zookeeper?
Can the balancer be run while Hadoop is in use?
What is unstructured data?
What are the network requirements for using hadoop?
What problems have you faced when you are working on Hadoop code?
what factors the block size takes before creation?
What is a checkpoint?
How Mapper is instantiated in a running job?
What is Hadoop Custom partitioner ?
Explain the wordcount implementation via hadoop framework ?
What is speculative execution in Hadoop?
explain Metadata in Namenode?
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