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

Is kafka an etl tool?

462

What language is apache kafka written in?

534

What is zookeeper server?

What is the difference between map and reduce?

627

What is optimal size of a file for distributed cache?

636

What can skew the mean?

282

What is vectorized query execution?

315

What is map side join?

303

What does dag stand for?

295

What is data ingestion pipeline?

321

What is the difference between reducebykey and groupbykey?

295

What is data skew and how do you fix it?

332

Is databricks a database?

316

Is databricks an etl tool?

287

What is a databricks cluster?

381

Un-Answered Questions { Hadoop }

What is the use of rdd in spark?

274

What are the main features of impala?

What is Pig Latin?

590

Have you ever used Counters in Hadoop. Give us an example scenario?

1063

On what basis data will be stored on a rack?

1140

How to create a custom key and custom value in MapReduce Job?

676

What OS Cassandra supports?

Explain how do ‘map’ and ‘reduce’ works?

736

Explain HCatInputFormat and HCatOutputFormat?

Is kafka a message queue?

559

Is spark sql faster than hive?

287

What does /etc /init.d do?

700

Can you explain benefits of spark over mapreduce?

287

Who invented spark?

410

What is node?

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