What is a Distributed Cache in Hadoop?
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Does Partitioner run in its own JVM or shares with another process?
What is difference between an input split and hdfs block?
What is heartbeat in hdfs? Explain.
What are the four essential parameters of a mapper?
What are the benefits of Spark over MapReduce?
What are advantages of Spark over MapReduce?
What is sqoop in Hadoop ?
What is the sequence of execution of map, reduce, recordreader, split, combiner, partitioner?
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.
what is a sequence file in Hadoop?
Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?
What are the disservices of utilizing Apache Spark over Hadoop MapReduce?
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