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 }

explain apache hbase?

153

What is the user of sparkContext?

329

What do you mean by data center in Cassandra?

What is action, how it process data in apache spark

353

What is difference between hadoop and spark?

318

What does /etc /init.d do?

738

Explain Accumulator in Spark?

467

Name the operating system(s) which are supported for production hadoop deployment?

475

What is a task tracker?

What hadoop does in safe mode?

702

What is a row in cassandra? And what are the different elements of it?

How to save RDD?

326

What is meant by rdd lazy evaluation?

418

Can you define pagerank?

304

Explain about the different types of join in Hive?

865

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