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 is the driver program in spark?

312

What is spark submit?

301

How do I clear my spark cache?

283

What is a partition in spark?

394

What is spark vectorization?

327

What is off heap memory in spark?

326

What is a tuple in spark?

300

Is spark an etl?

304

How is rdd distributed?

335

What are the common transformations in apache spark?

303

What is the difference between dataset and dataframe in spark?

380

What is distributed cache in spark?

364

What is catalyst framework in spark?

320

How is dag created in spark?

303

What does spark do during speculative execution?

344

Un-Answered Questions { Hadoop }

Define a combiner?

691

What are all stats classes in the org.apache.pig.tools.pigstats package?

605

what are the values stored in the cassandra column?

Use of Help command in Hadoop sqoop?

Give the differences between the different types of primary keys in cassandra?

What is Hive Database?

737

Mention what is HiveServer2 (HS2)?

818

How do I start flume agent?

How many InputSplits is made by a Hadoop Framework?

713

What are the additional benefits YARN brings in to Hadoop?

1005

Is it possible to leverage real-time analysis of the big data collected by Flume directly? If yes, then explain how?

148

Is it possible to iterate through the rows of HBase table in reverse order?

218

What is apache spark and what is it used for?

341

What is Hadoop Distributed File System- HDFS?

What is regionserver?

181

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