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

What is the role of Zookeeper in HBase architecture?

604

What are the different types of tombstone markers in HBase for deletion?

860

Is there any difference between HBase datamodel and RDBMS datamodel?

1089

What is Apache Flume?

108

What is difference between memory channel and file channel in flume?

How multi-hop agent can be setup in Flume?

110

Explain a common use case for Flume?

Explain about the different channel types in Flume.

What are core components of Flume?

100

Which channel type is faster in Flume?

120

What are Flume events?

How many Reducers should be configured?

164

Can we change the body of the flume event?

Does Flume provide 100% reliability to the data flow?

135

Explain about the core components of Flume?

Un-Answered Questions { Hadoop }

If you run a select * query in hive, why does it not run mapreduce?

710

Explain the filter transformation?

303

Why do we need rdd in spark?

269

What is a UDF in Pig?

703

What is the difference between Job and Task in MapReduce?

585

Is there any benefit of learning MapReduce, then?

278

What is the role of the zookeeper?

What is Spark Dataset?

311

How is spark sql different from hql and sql?

251

Which command do we use to show the version?

160

Does apache flume support third-party plugins?

What is the role zookeeper plays in a cluster of kafka?

471

Is hadoop the future?

607

Explain tokenize?

540

What is scala spark?

278

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