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 are the roles of the file system in any framework?

328

Name some companies that are already using Spark Streaming?

285

What is Spark Streaming?

313

What does it mean by Columnar Storage Format?

315

What is Spark Dataset?

339

Why is there a need for broadcast variables when working with Apache Spark?

323

What is the abstraction of Spark Streaming?

276

What are shared variables?

349

Does Spark provide the storage layer too?

297

What are the advantages of datasets in spark?

296

How to save RDD?

326

What are the common faults of the developer while using Apache Spark?

305

When creating an RDD, what goes on internally?

306

What is Spark MLlib?

436

What is meant by Transformation? Give some examples.

323

Un-Answered Questions { Hadoop }

What is structured and unstructured data?

504

Name a few import control commands. How can Sqoop handle large objects?

when hadoop enter in safe mode?

794

What is difference between coalesce and repartition?

381

How can you see the list of stored jobs in sqoop metastore?

What is a rack?

468

How to add/delete a Node to the existing cluster?

574

Which among the two is preferable for the project- Hadoop MapReduce or Apache Spark?

651

Do I need scala for spark?

314

What the information segments utilized by hadoop are?

458

What are the different types of tables available in Hive?

741

how will you implement SQL in Spark?

395

List few differences between apache kafka and rabbitmq?

612

Can we have multiple entries in the master files?

743

In the Producer, when does QueueFullException occur?

598

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