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

Discuss the various running mode of Apache Spark?

283

Describe Spark SQL?

326

Explain SparkContext in Apache Spark?

310

What are the types of Transformation in Spark RDD Operations?

273

Explain first() operation in Apache Spark RDD?

356

What are the ways in which Apache Spark handles accumulated Metadata?

345

Explain the various Transformation on Apache Spark RDD like distinct(), union(), intersection(), and subtract()?

277

Is it possible to run Apache Spark without Hadoop?

266

What is Apache Spark Streaming?

315

How can you implement machine learning in Spark?

262

List some commonly used Machine Learning Algorithm Apache Spark?

267

What is the command to start and stop the Spark in an interactive shell?

300

List out the ways of creating RDD in Apache Spark?

270

What are the various advantages of DataFrame over RDD in Apache Spark?

298

What is flatmap in apache spark?

311

Un-Answered Questions { Hadoop }

What is lazy evaluation and how is it useful?

281

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

406

What is the difference between map and reduce?

587

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1010

What is the importance of — the split-by clause in running parallel import tasks in sqoop?

Can spark work without hadoop?

312

What is org.apache.jute package?

How can one copy a file into HDFS with a different block size to that of existing block size configuration?

What is the maximum size of string data type supported by hive? Mention the hive support binary formats.

605

How much Metadata will be created on NameNode in Hadoop?

What is a bag in apache pig?

515

What are input format, input split & record reader and what they do?

579

Name a few import control commands. How can Sqoop handle large objects?

What are the stable versions of Hadoop?

959

How many instances of tasktracker run on a hadoop cluster?

640

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