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

Explain the term 'Log Anatomy'?

550

what is the traditional method of message transfer?

687

Explain Sort Order in brief?

164

When to use Avro, explain?

Name some AVRO Reference APIs?

What is the way of creating Avro Schemas?

Who developed Apache Avro?

What is the required action you need to perform if you opt for scheduled maintenance on the cluster nodes?

What are the purposes of using Ambari shell?

What is the role of “ambari-qa” user?

How can we see all the clusters that are available in Ambari?

143

What are the different ways you can use to secure a cluster using Ambari?

How is recovery achieved in Ambari?

Name the three layers, Ambari supports?

State some highlights of Ambari?

Un-Answered Questions { Hadoop }

What is ObjectInspector functionality?

829

What is a reliable and unreliable receiver in Spark?

322

How would you tackle counting words in several text documents?

1030

Explain what is Cassandra-Cqlsh?

What are the exact differences between reduce and fold operation in Spark?

451

Explain about the execution pl of a pig script?
or
differentiate between the logical and physical plan of an apache pig script?

513

Can you explain broadcast variables?

296

How do I set up flume agent?

Can you explain textinformat?

503

What is sink in flume?

What is mllib?

280

If reducers do not start before all mappers finish then why does the progress on mapreduce job shows something like map(50%) reduce(10%)? Why reducers progress percentage is displayed when mapper is not finished yet?

728

How Cassandra provide High availability feature?

Difference between order by and sort by in Hive?

736

Explain the difference between COUNT_STAR and COUNT functions in Apache Pig?

780

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