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 use of tools command?

204

Which command do we use to show the version?

164

What are the DDL commands used in hbase?

156

How will you explain COGROUP in Pig?

688

What are the 2 modes used to run pig scripts?

648

What co-group does in Pig?

667

Is the keyword ‘FUNCTIONAL’ a User Defined Function (UDF)?

592

Is the keyword ‘DEFINE’ as a function name?

605

How to show up details in pig ?

629

What does FOREACH do?

610

What relational operators can we use that are related to combining and splitting in Pig language?

590

What are the different modes available in Pig?

597

How is Pig Useful For?

668

How to restrict the number of lines to be printed in pig ?

621

What is the difference between logical and physical plans?

587

Un-Answered Questions { Hadoop }

If map reduce is inferior to spark then is there any benefit of learning it?

302

can you explain about configuration files?

How do ‘map’ and ‘reduce’ work?

705

What happens when we submit a spark job?

326

Can you explain spark streaming?

317

What is Replication Factor in Cassandra?

Name different types of the data model?

Mention what are the most common input formats defined in hadoop?

479

What is sink in flume?

Explain some of the basic commands used for Apache Ambari server?

What is the purpose of Hive Driver?

1090

How does broadcast join work in spark?

319

Explain the different logging levels in cassandra.

Explain what are the basic parameters of a mapper?

861

What happens if the preferred replica is not in the isr?

610

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