Hadoop Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apache Hadoop (394)
MapReduce (354)
Apache Hive (345)
Apache Pig (225)

Apache Ambari (93)
Apache HCatalog (34)
Apache HDFS Hadoop Distributed File System (214)
Apache Kafka (189)

Hadoop Interview Questions

Questions Answers Views Company eMail

Is hbase an os independent approach?

196

How can you make sure of logical grouping of cells in the hbase?

207

Mention how many operational commands in hbase?

297

What is the role of zookeeper in hbase?

187

When should you use a reducer?

681

Can you tell us how many daemon processes run on a hadoop system?

639

Difference between mapreduce and spark

740

What is identity mapper and identity reducer?

692

What is heartbeat in hdfs? Explain.

745

What is identity mapper and chain mapper?

716

Name job control options specified by mapreduce.

758

What is heartbeat in hdfs?

706

What is difference between an input split and hdfs block?

702

How do reducers communicate with each other?

731

How does inputsplit in mapreduce determines the record boundaries correctly?

686

Un-Answered Questions { Hadoop }

What do you understand by Data Replication in Cassandra?

113

What are the Optimizations a developer can use during joins?

569

How do you organize the pig latin statements?

634

What is difference the between sqoop and distcp?

Explain hdfs?

What is ColumnFamily?

What is the difference between python and spark?

293

Explain about the different types of transformations on DStreams?

406

What is MapFile?

1001

What is the non dfs used?

594

How the read operation is performed on Cassandra node ?

104

How is hdfs block size different from traditional file system block size?

Explain the Reducer's Sort phase?

928

How to Rename a table in Hive

796

Why does my select statement fail?

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