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?

189

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

203

Mention how many operational commands in hbase?

290

What is the role of zookeeper in hbase?

185

When should you use a reducer?

640

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

595

Difference between mapreduce and spark

692

What is identity mapper and identity reducer?

648

What is heartbeat in hdfs? Explain.

687

What is identity mapper and chain mapper?

676

Name job control options specified by mapreduce.

717

What is heartbeat in hdfs?

652

What is difference between an input split and hdfs block?

663

How do reducers communicate with each other?

673

How does inputsplit in mapreduce determines the record boundaries correctly?

652

Un-Answered Questions { Hadoop }

How does inputsplit in mapreduce determines the record boundaries correctly?

652

List out the different stream grouping in apache storm?

391

In how many ways RDDs can be created? Explain.

302

Can you execute Hadoop dfs Commands from Hive CLI? How?

1177

How can you schedule a sqoop job using Oozie?

Does spark need hdfs?

291

Is apache spark a tool?

272

Can we do online transactions(oltp) using hadoop?

676

Is reduce-only job possible in Hadoop MapReduce?

701

Is map like a pointer?

924

Can free-form SQL queries be used with Sqoop import command? If yes, then how can they be used?

What is the difference between Spark Transform in DStream and map ?

298

Why are Replications critical in Kafka?

580

Name different types of the data model?

What does producer api in kafka?

497

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