Have you ever used Counters in Hadoop. Give us an example scenario?
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How can we check whether namenode is working or not?
How does NameNode tackle DataNode failures?
What is the meaning of speculative execution in Hadoop? Why is it important?
What is configuration of a typical slave node on Hadoop cluster? How many JVMs run on a slave node?
What infrastructure do we need to process 100 TB data using Hadoop?
What is a checkpoint?
Which is the best hadoop certification?
how would you modify that solution to only count the number of unique words in all the documents?
Name some companies that use Hadoop?
Mention what is the number of default partitioner in Hadoop?
when hadoop enter in safe mode?
What is a speculative execution in Apache Hadoop MapReduce?
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