what is Speculative Execution?
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Illustrate a simple example of the working of MapReduce.
What is shuffling in mapreduce?
How to write a custom partitioner for a Hadoop MapReduce job?
What are the various InputFormats in Hadoop?
what is a Task Tracker in Hadoop?
how to proceed to write your first mapreducer program?
What is a combiner and where you should use it?
How to compress mapper output in Hadoop?
What is shuffleing in mapreduce?
How many Reducers run for a MapReduce job in Hadoop?
What is heartbeat in hdfs? Explain.
how indexing in HDFS is done?
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