Explain what is shuffling in mapreduce?
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What is Counter in MapReduce?
Define speculative execution?
What is a "reducer" in Hadoop?
Is it important for Hadoop MapReduce jobs to be written in Java?
How to change a number of mappers running on a slave in MapReduce?
What are ‘reduces’?
What is the utility of using Writable Comparable Custom Class in Map Reduce code?
what daemons run on a master node and slave nodes?
When Namenode is down what happens to job tracker?
How to create custom key and custom value in MapReduce Job?
Explain InputSplit in Hadoop MapReduce?
What is the Job interface in MapReduce framework?
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