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?

445

Explain what is a task tracker in hadoop?

456

Explain what is speculative execution?

424

Explain what happens in text format?

573

Mention what is distributed cache in hadoop?

440

Explain how can you debug hadoop code?

468

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

431

Explain what is webdav in hadoop?

508

Mention what job does the conf class do?

424

For using hadoop list the network requirements?

471

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

141

What are the main key structures of hbase?

167

What is the use of hbase hmaster?

149

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

173

Explain what is wal and hlog in hbase?

312

Un-Answered Questions { Hadoop }

Do I need to know scala to learn spark?

362

How to create directory in HDFS?

Do we need scala for spark?

305

What is non-dfs used in hdfs web console

How will you connect Apache Spark with Apache Mesos?

267

What is a "Spark Executor"?

349

What is the main difference between kafka and fume?

594

What is ZooKeeper Client?

What does spark do during speculative execution?

331

Is Apache Kafka is a distributed streaming platform? if yes, what you can do with it?

631

Explain about the scalar datatypes in Apache Pig?

896

How can you remove the elements with a key present in any other RDD?

298

What is the use of hbase hmaster?

149

What are Watches in ZooKeeper?

How can one increase replication factor to a desired value in Hadoop?

1120

For More Un-Answered { Hadoop } Questions Click Here