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?

279

Describe Spark SQL?

318

Explain SparkContext in Apache Spark?

306

What are the types of Transformation in Spark RDD Operations?

266

Explain first() operation in Apache Spark RDD?

350

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

341

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

269

Is it possible to run Apache Spark without Hadoop?

262

What is Apache Spark Streaming?

309

How can you implement machine learning in Spark?

255

List some commonly used Machine Learning Algorithm Apache Spark?

260

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

294

List out the ways of creating RDD in Apache Spark?

264

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

291

What is flatmap in apache spark?

304

Un-Answered Questions { Hadoop }

What is lazy evaluation in Spark?

298

Is fs.mapr.working.dir a single directory?

639

Can we run spark on windows?

268

What is mllib?

269

What happens if the preferred replica is not in the isr?

534

How do you set up a spark?

253

Explain a common use case for Flume?

What is throughput? How does HDFS get a good throughput?

What is pipelined rdd?

241

Double type in Hive - Important points?

643

Name few companies that are the uses of apache spark?

279

How will you backup an HBase cluster?

139

What is scala and spark?

253

What is executor memory and driver memory in spark?

262

Can you use Spark to access and analyse data stored in Cassandra databases?

351

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