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()?

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?

Define consistency?

126

Why we use parallelize in spark?

268

What is Flume?

108

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