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?

457

Explain what happens in text format?

611

Mention what is distributed cache in hadoop?

471

Explain how can you debug hadoop code?

497

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

476

Explain what is webdav in hadoop?

545

Mention what job does the conf class do?

463

For using hadoop list the network requirements?

508

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 }

Which object can be used to get the progress of a particular job

508

What are the limitations of Hive?

1067

Explain the tajo architecture?

How many distinct layers are of storm’s codebase?

634

In which location name node sores its metadata and why?

701

Explain about the core components of Flume?

Name three data source available in SparkSQL

319

What is the key difference between NameNode and DataNode in Hadoop?

525

Can we run Apache Spark without Hadoop?

329

Explain the role of offset in kafka?

558

What is sink processors?

101

Explain Creating an Index?

Do you know the comparative differences between apache spark and hadoop?

284

What are the befefits of nosql over relational database?

Can you give some examples of Big Data?

520

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