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Hadoop Interview Questions
Questions Answers Views Company eMail

Is kafka an etl tool?

513

What language is apache kafka written in?

578

What is zookeeper server?

1

What is the difference between map and reduce?

689

What is optimal size of a file for distributed cache?

684

What can skew the mean?

298

What is vectorized query execution?

329

What is map side join?

317

What does dag stand for?

308

What is data ingestion pipeline?

332

What is the difference between reducebykey and groupbykey?

308

What is data skew and how do you fix it?

342

Is databricks a database?

338

Is databricks an etl tool?

305

What is a databricks cluster?

396


Un-Answered Questions { Hadoop }

when you can use Alter keyspace?

124


Define functions of SparkCore?

514


What is the use of spark sql?

290


What is the use of mysql connector?

5


What is kafka message?

539


If DataNode increases, then do we need to upgrade NameNode in Hadoop?

496


What is big data spark?

330


What are shared variables in Apache Spark?

339


Explain SHOW and DESCRIBE Commands in Hive?

788


Mention what are the main components of cassandra data model?

92


What is the difference between the ZooKeeper ensemble and ZooKeeper quorum?

5


Is spark part of hadoop?

301


Can we rename the output file?

733


What are Flume events?

97


What is the difference between Pig and SQL?

672