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Explain JobConf in MapReduce.
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Why MapReduce uses the key-value pair to process the data?
what are the basic parameters of a Mapper?
What are combiners? When should I use a combiner in my MapReduce Job?
How will you submit extra files or data ( like jars, static files, etc. ) For a mapreduce job during runtime?
What combiners are and when you should use a combiner in a mapreduce job?
How data is spilt in Hadoop?
How to create custom key and custom value in MapReduce Job?
What is Text Input Format?
What is the difference between map and reduce?
how to proceed to write your first mapreducer program?
Can we set the number of reducers to zero in MapReduce?
Mention Hadoop core components?
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Apache Hadoop (394) - MapReduce (354)
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- Apache ZooKeeper (65)
- Apache Ambari (93)
- Apache HCatalog (34)
- Apache HDFS Hadoop Distributed File System (214)
- Apache Kafka (189)
- Apache Avro (26)
- Apache Presto (15)
- Apache Tajo (26)
- Hadoop General (407)
