Explain what you understand by speculative execution
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What is the fundamental difference between a MapReduce Split and a HDFS block?scale data processing?
mapper or reducer?
What is a mapreduce algorithm?
What is RecordReader in a Map Reduce?
What does conf.setmapper class do?
What is the role of recordreader in hadoop mapreduce?
What are ‘reduces’?
What is LazyOutputFormat in MapReduce?
How do Hadoop MapReduce works?
What are the four basic parameters of a reducer?
What is optimal size of a file for distributed cache?
What is the core of the job in MapReduce framework?
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