How does fault tolerance work in mapreduce?
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What is shuffleing in mapreduce?
What is the need of MapReduce?
How to specify more than one directory as input to the MapReduce Job?
What are the key differences between Pig vs MapReduce?
How to optimize MapReduce Job?
Define speculative execution?
Whether the output of mapper or output of partitioner written on local disk?
What is sqoop in Hadoop ?
Is reduce-only job possible in Hadoop MapReduce?
What is the input type/format in MapReduce by default?
How to create a custom key and custom value in MapReduce Job?
Mention what is the next step after mapper or maptask?
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