What is heartbeat in hdfs? Explain.
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What are the identity mapper and reducer in MapReduce?
Detail description of the Reducer phases?
What is MapReduce in Hadoop?
How many Reducers run for a MapReduce job?
what are the main configuration parameters that user need to specify to run Mapreduce Job ?
In which kind of scenarios MapReduce jobs will be more useful than PIG in Hadoop?
What is sqoop in Hadoop ?
what is WebDAV in Hadoop?
Is reduce-only job possible in Hadoop MapReduce?
How to submit extra files(jars,static files) for MapReduce job during runtime in Hadoop?
How hadoop mapreduce works?
Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
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