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Hadoop Interview Questions
Questions Answers Views Company eMail

Is kafka an etl tool?

426

What language is apache kafka written in?

499

What is zookeeper server?

1

What is the difference between map and reduce?

572

What is optimal size of a file for distributed cache?

587

What can skew the mean?

258

What is vectorized query execution?

291

What is map side join?

285

What does dag stand for?

276

What is data ingestion pipeline?

301

What is the difference between reducebykey and groupbykey?

272

What is data skew and how do you fix it?

311

Is databricks a database?

295

Is databricks an etl tool?

271

What is a databricks cluster?

361


Un-Answered Questions { Hadoop }

What is shark?

272


HDFS is used for applications with large data sets, not why Many small files?

38


Why lazy evaluation is good in spark?

264


Is there a dual table?

42


What is hadoop sqoop?

5


Can you define inputsplit in hadoop?

423


How to specify more than one directory as input in the Hadoop MapReduce Program?

660


Can you define what is Event Serializer in Flume?

88


Is secondary namenode a substitute to the namenode?

624


How can you set an arbitrary number of mappers to be created for a job in Hadoop?

412


Why Apache Spark?

300


What is Disk Balancer in Hadoop?

453


What are accumulators in spark?

286


Does sqoop use mapreduce?

1


What are the three components of Cassandra write?

114