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 ways in which one can know that the given operation is transformation or action?

294

Describe join() operation. How is outer join supported?

304

What is the method to create a data frame?

329

On what all basis can you differentiate rdd, dataframe, and dataset?

327

How can you manually partition the rdd?

316

How to create an rdd?

308

What is an rdd?

324

Explain the top() and takeordered() operation?

350

What are the major features/characteristics of rdd (resilient distributed datasets)?

321

What is the difference between map and flatmap?

326

How to identify that the given operation is transformation or action?

288

Why we need compression and what are the different compression format supported?

301

Is ambari python client can be used to make good use of ambari api’s?

Mention what does the shell commands “capture” and “consistency” determines?

Explain what is composite type in cassandra?

Un-Answered Questions { Hadoop }

Can the balancer be run while Hadoop is in use?

1020

Explain how input and output data format of the hadoop framework?

749

What is executor and driver in spark?

299

Which are the methods in the mapper interface?

690

What is graph db? Explain with an example.

List some use cases of apache kafka?

526

Can any impala query also be executed in hive?

What does the file hadoop-metrics.properties do?

536

What is scala spark?

312

In Hadoop, which file controls reporting in Hadoop?

830

Clarify what is sequence file input format?

575

Explain how to Tune Kafka for Optimal Performance?

590

Can you explain spark streaming?

317

What happens if the block in HDFS is corrupted?

Describe the different consistency levels for read operation in cassandra?

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