how can you check whether Namenode is working beside using the jps command?
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Explain the features of Apache Spark because of which it is superior to Apache MapReduce?
What is difference between a MapReduce InputSplit and HDFS block
Why Mapper runs in heavy weight process and not in a thread in MapReduce?
what is NameNode in Hadoop?
How to handle record boundaries in Text files or Sequence files in MapReduce InputSplits?
What is the next step after Mapper or MapTask?
What is identity mapper and identity reducer?
When Namenode is down what happens to job tracker?
what daemons run on a master node and slave nodes?
In MapReduce Data Flow, when Combiner is called?
What does a split do?
What combiners are and when you should use a combiner in a mapreduce job?
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