What is the inputsplit in map reduce software?
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What combiners are and when you should utilize a combiner in a map reduce job?
What is heartbeat in hdfs? Explain.
When Namenode is down what happens to job tracker?
What is Reducer in MapReduce?
how can you debug Hadoop code?
how can you check whether Namenode is working beside using the jps command?
Is reduce-only job possible in Hadoop MapReduce?
Explain how do ‘map’ and ‘reduce’ work?
How to submit extra files(jars, static files) for MapReduce job during runtime?
Explain about the partitioning, shuffle and sort phase in MapReduce?
What is heartbeat in hdfs?
Explain what is the function of mapreduce partitioner?
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