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Is it important for Hadoop MapReduce jobs to be written in Java?
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what are the three modes in which Hadoop can be run?
Why is Apache Spark faster than Hadoop MapReduce?
What is a combiner and where you should use it?
What is shuffling and sorting in Hadoop MapReduce?
When is it suggested to use a combiner in a MapReduce job?
Can you tell us how many daemon processes run on a hadoop system?
What counter in Hadoop MapReduce?
Explain the sequence of execution of all the components of MapReduce like a map, reduce, recordReader, split, combiner, partitioner, sort, shuffle.
What is shuffling in mapreduce?
Map reduce jobs take too long. What can be done to improve the performance of the cluster?
For a Hadoop job, how will you write a custom partitioner?
What are the data components used by Hadoop?
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Apache Hadoop (394) - MapReduce (354)
- Apache Hive (345)
- Apache Pig (225)
- Apache Spark (991)
- Apache HBase (164)
- Apache Flume (95)
- Apache Impala (72)
- Apache Cassandra (392)
- Apache Mahout (35)
- Apache Sqoop (82)
- 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)
