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What comes in Hadoop 2.0 and MapReduce V2 YARN
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In Hadoop what is InputSplit?
how indexing in HDFS is done?
Define speculative execution?
how can you check whether Namenode is working beside using the jps command?
MapReduce Types and Formats and Setting up a Hadoop Cluster?
What is a scarce system resource?
How would you tackle calculating the number of unique visitors for each hour by mining a huge apache log? You can use post processing on the output of the mapreduce job.
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
Explain what you understand by speculative execution
How to change a number of mappers running on a slave in MapReduce?
What is heartbeat in hdfs? Explain.
When is the reducers are started in a MapReduce job?
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