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What are combiners? When should I use a combiner in my MapReduce Job?
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Explain what is “map” and what is "reducer" in hadoop?
When is it not recommended to use MapReduce paradigm for large scale data processing?
how indexing in HDFS is done?
How can we assure that the values regarding a particular key goes to the same reducer?
List the network requirements for using Hadoop ?
Describe what happens to a mapreduce job from submission to output?
What is the difference between map and reduce?
Which one will you decide for an undertaking – Hadoop MapReduce or Apache Spark?
What do you understand by compute and storage nodes?
What can be optimum value for Reducer?
what is Speculative Execution?
Write a Mapreduce Program for Character Count ?
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