Explain what is “map” and what is "reducer" in hadoop?
- 0 Answers
- 469 Views
- I also Faced
- E-Mail Answers
More MapReduce Interview Questions
what happens in textinformat ?
What is map/reduce job in hadoop?
how is data partitioned before it is sent to the reducer if no custom partitioner is defined in Hadoop?
What is Hadoop Map Reduce ?
What is the data storage component used by Hadoop?
Where is Mapper output stored?
What is Output Format in MapReduce?
What does conf.setmapper class do?
Explain the Reducer's Sort phase?
Where sorting is done on mapper node or reducer node in MapReduce?
Explain the differences between a combiner and reducer
when do reducers play their role in a mapreduce task?
Categories
-
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)
