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Hadoop Interview Questions
Questions Answers Views Company eMail

What is a "map" in Hadoop?

795

What is a "reducer" in Hadoop?

873

what is Speculative Execution?

833

Explain JobConf in MapReduce.

811

What is OutputCommitter?

811

How is reporting controlled in hadoop?

782

What is Hadoop Map Reduce ?

805

what does the text input format do?

817

What happens when a datanode fails ?

778

In Hadoop, which file controls reporting in Hadoop?

774

how can you debug Hadoop code?

843

For a job in Hadoop, is it possible to change the number of mappers to be created?

788

What are the primary phases of a Reducer?

826

how indexing in HDFS is done?

855

What is the role of a MapReduce partitioner?

806


Un-Answered Questions { Hadoop }

Name a few import control commands. How can Sqoop handle large objects?

5


What is rack awareness in hadoop?

487


Explain slot in Hadoop Map-Reduce v1?

688


What is meant by spark in big data?

277


What Is Difference Between Mapreduce and Pig ?

626


What are the core apis in kafka?

596


Where is Mapper output stored?

854


What are the types of cluster managers in spark?

282


What is a task instance in hadoop? Where does it run?

615


Would you be able to change the block size of hdfs files?

45


Differentiate between the terms: node, a cluster, and data center in cassandra?

91


How to copy a file into HDFS with a different block size to that of existing block size configuration?

38


What is flume and sqoop?

107


how Cassandra delete Data?

114


What is the maximum size of a message that can be received by the kafka?

553