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 how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

477

Explain what is a task tracker in hadoop?

500

Explain what is speculative execution?

458

Explain what happens in text format?

611

Mention what is distributed cache in hadoop?

471

Explain how can you debug hadoop code?

503

Explain how can you check whether namenode is working beside using the jps command?

477

Explain what is webdav in hadoop?

546

Mention what job does the conf class do?

465

For using hadoop list the network requirements?

510

Explain deletion in hbase? Mention what are the three types of tombstone markers in hbase?

148

What are the main key structures of hbase?

167

What is the use of hbase hmaster?

151

Which technique can you use in hbase to access hfile directly without the help of hbase?

182

Explain what is wal and hlog in hbase?

320

Un-Answered Questions { Hadoop }

What is combiner aggregator?

639

What is the problem with the small file in Hadoop?

686

When you point a partition of a hive table to a new directory, what happens to the data?

798

What do you understand about yarn?

307

Explain why to use hbase?

166

What is the Repository?

Name the filter which accepts the page size as the parameter in hbase?

190

What does apache spark do?

338

What is 'jps'?

466

Why do we need hdfs?

Which companies are mostly using Hive ?

824

How does hbase actually delete a row?

203

What is a Sparse Vector?

353

what is the traditional method of message transfer?

718

How does hadoop achieve fault tolerance?

447

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