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?

239

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

287

In what ways sparksession different from sparkcontext?

319

Explain fold() operation in spark?

291

Define sparkcontext in apache spark?

295

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

285

What is map in apache spark?

255

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

249

Define various running modes of apache spark?

265

What are the ways to run spark over hadoop?

287

What is catalyst query optimizer in apache spark?

276

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

261

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

270

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

324

What is speculative execution in spark?

303

Un-Answered Questions { Hadoop }

What is ttl (time to live) in hbase?

176

What are the modules that constitute the Apache Hadoop 2.0 framework?

955

What is the bag?

486

Define hadoop archives? What is the command for archiving a group of files in hdfs.

Difference between hive and impala?

686

How many JVMs run on a slave node?

977

Define paired RDD in Apache Spark?

258

Mention some instances where zookeeper is using?

What is the use of map transformation?

293

What file systems Spark support?

318

What is a hive on spark?

271

Is it possible to have hadoop job output in multiple directories?

406

How is 0xdata's h2o different from apache mahout ?

What are the tools used in big data?

396

What is non-dfs used in hdfs web console

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