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What is partitioner and its usage?
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What main configuration parameters are specified in mapreduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
How can you add the arbitrary key-value pairs in your mapper?
What platform and Java version is required to run Hadoop?
What is the function of mapreduce partitioner?
Why Mapreduce output written in local disk?
Does mapreduce programming model provide a way for reducers to communicate with each other? In a mapreduce job can a reducer communicate with another reducer?
What is a MapReduce Combiner?
what happens when Hadoop spawned 50 tasks for a job and one of the task failed?
Explain InputSplit in Hadoop MapReduce?
Where the mapper's intermediate data will be stored?
Difference between mapreduce and spark
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Apache Hadoop (394) - MapReduce (354)
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- Apache Pig (225)
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- Apache Flume (95)
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- Apache ZooKeeper (65)
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- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
- Apache Avro (26)
- Apache Presto (15)
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- Hadoop General (407)
