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?

283

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

293

What is the method to create a data frame?

319

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

304

How can you manually partition the rdd?

301

How to create an rdd?

300

What is an rdd?

313

Explain the top() and takeordered() operation?

327

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

309

What is the difference between map and flatmap?

305

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

277

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

283

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 }

What is difference between dataset and dataframe?

389

Is it necessary to learn hadoop for spark?

298

CONCAT function in Hive with Example?

829

What is the difference between traditional RDBMS and Hadoop?

1178

What is the Use of Cassandra Database ?

What is data skew in spark?

304

What is spark context spark session?

286

Explain the process of spilling in MapReduce?

604

What do you understand by an inner bag and outer bag in Pig?

858

What happens if rdd partition is lost due to worker node failure?

457

Give the command to see the indexes on a table?

930

Clarify what combiners are and when you should utilize a combiner in a map reduce job?

601

How does spark work with python?

298

When to use explode in Hive?

757

Explain first() operation in Apache Spark RDD?

369

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