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 standalone mode in spark cluster?

283

Explain apache spark streaming? How is the processing of streaming data achieved in apache spark?

316

In what ways sparksession different from sparkcontext?

360

Explain fold() operation in spark?

319

Define sparkcontext in apache spark?

323

List out the various advantages of dataframe over rdd in apache spark?

318

What is map in apache spark?

287

Write the command to start and stop the spark in an interactive shell?

284

Define various running modes of apache spark?

303

What are the ways to run spark over hadoop?

324

What is catalyst query optimizer in apache spark?

306

What are the various types of shared variable in apache spark?

309

Define the common faults of the developer while using apache spark?

306

What is the use of spark driver, where it gets executed on the cluster?

394

What is speculative execution in spark?

342

Un-Answered Questions { Hadoop }

Explain about catalog configuration?

What is flume agent?

What are the drawbacks of Pig?

652

What are the port numbers of task tracker?

488

What is NameNode? How NameNode tackle Datanode failures in Hadoop?

498

What is executor in spark?

326

What is Hector in Cassandra?

102

what is (HS2) HiveServer2?

723

What is shuffle spill in spark?

294

Why Apache Spark?

335

What are the names of daemons in impala?

How do users interact with the shell in apache pig?

570

What do you know about the speculative execution?

496

Can free-form SQL queries be used with Sqoop import command? If yes, then how can they be used?

What operations RDD support?

323

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