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 do we mean by Partitions or slices?

283

How can you store the data in spark?

322

What are the advantages of DataFrame?

315

What are the components of Spark Ecosystem?

306

How is data represented in Spark?

312

What is the difference between Spark Transform in DStream and map ?

298

Explain various level of persistence in Apache Spark?

302

What are benefits of DataFrame in Spark?

328

What are the various programming languages supported by Spark?

355

What is accumulator?

326

Explain different transformation on DStream?

284

What are Paired RDD?

315

Name some sources from where Spark streaming component can process real-time data?

293

What is meant by in-memory processing in Spark?

311

Explain what are the various types of Transformation on DStream?

282

Un-Answered Questions { Hadoop }

What is the procedure for namenode recovery?

463

What are the different Eval functions available in Pig?

569

What are the key features of any nosql database?

What is full form of rdd?

389

List out the other components of cassandra?

How to iterate all rows in ColumnFamily?

What are the main methods of data transferring in hadoop sqoop?

What are the different execution modes available in Pig?

559

What is jmx? And how is it useful in cassandra?

What does flatten do in pig?

725

What daemons run on master nodes?

490

What according to you is a common mistake apache spark developers make when using spark ?

275

Does Apache Spark provide checkpoints?

286

HDFS is used for applications with large data sets, not why Many small files?

Can you mention some features of spark?

320

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