Explain what you understand by speculative execution
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Define Writable data types in MapReduce?
What are combiners? When should I use a combiner in my MapReduce Job?
what is the Hadoop MapReduce APIs contract for a key and value class?
Describe what happens to a mapreduce job from submission to output?
What are the key differences between Pig vs MapReduce?
Is there any point of learning mapreduce, then?
Where the mapper's intermediate data will be stored?
How to specify more than one directory as input in the Hadoop MapReduce Program?
Explain slot in Hadoop Map-Reduce v1?
What is Shuffling and Sorting in a MapReduce?
what daemons run on a master node and slave nodes?
What is shuffling in mapreduce?
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