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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()?

270

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 }

Explain about ACID transactions in Hive?

683


How is a keyspace created in cassandra?

116


Can you define yarn?

269


Why can we not create directory /user/dataflair/inpdata001 when name node is in safe mode?

408


Mention what is the number of default partitioner in Hadoop?

638


Where is Mapper output stored?

805


How should 'store' keyword is useful in pig scripts?

606


Define parquet file format? How to convert data to parquet format?

306


What are the file formats that Hive supports and can use be used for storage?

822


What are ‘reduces’?

662


What is spark repartition?

295


Tell something about the query language used in Cassandra Database?

72


Define consistency?

126


Why we use parallelize in spark?

268


What is Flume?

108