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Hadoop Interview Questions
Questions Answers Views Company eMail

Is it important for Hadoop MapReduce jobs to be written in Java?

798

what job does the conf class do?

752

What is the key- value pair in Hadoop MapReduce?

644

What is InputFormat in Hadoop MapReduce?

633

What are the various InputFormats in Hadoop?

617

Explain InputSplit in Hadoop MapReduce?

635

How much space will the split occupy in Mapreduce?

642

What is a RecordReader in Hadoop MapReduce?

645

What is the difference between HDFS block and input split?

854

How to write MapReduce Programs?

667

What is Apache Hive?

775

What kind of applications is supported by Apache Hive?

757

How can you configure remote metastore mode in Hive?

778

What is indexing and why do we need it?

760

What is the use of Hcatalog?

895


Un-Answered Questions { Hadoop }

What is apache spark good for?

274


What are advantages of Spark over MapReduce?

652


Explain cassandra.

62


Can I set the number of reducers to zero?

377


Explain future growth of Apache Ambari?

61


Hadoop sqoop word came from?

5


What is having clause in apache tajo?

5


List commonly used machine learning algorithm?

288


What is Spark?

261


What can skew the mean?

268


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

654


Which java class handles the output record encoding into files which result from Hive queries?

635


Is JDBC driver enough to connect sqoop to the databases?

5


What is InputFormat in Hadoop MapReduce?

633


What is difference between map and flatmap?

276