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 mllib?

279

What is meant by rdd lazy evaluation?

405

What is the difference between spark and apache spark?

320

What rdd stands for?

320

How does spark rdd work?

317

What is spark databricks?

314

What does apache spark stand for?

281

What are the libraries of spark sql?

288

What is the use of spark sql?

275

What is sparksession and sparkcontext?

273

Should I install spark on all nodes of yarn cluster?

339

How do I get apache spark on windows 10?

299

Where are rdd stored?

291

What is shuffle in spark?

405

Do I need to install hadoop for spark?

272

Un-Answered Questions { Hadoop }

List out some key features of apache cassandra?

What is cluster in Cassandra?

What is data replication in Cassandra?

What is Sqoop Validation?

What is the role of zookeeper in hbase?

185

How are sparks created?

293

What are the ways to create RDDs in Apache Spark? Explain.

308

What is the function of "MLlib"?

308

What do you mean by Free Form Import in Sqoop?

How to Write a UDF function in Hive?

702

Explain how are file systems checked in hdfs?

Differentiate between piglatin and hiveql?

573

Why is transformation lazy operation in Apache Spark RDD? How is it useful?

287

What are the various levels of persistence in Apache Spark?

320

Web-ui shows that half of the datanodes are in decommissioning mode. What does that mean? Is it safe to remove those nodes from the network?

445

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