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Hadoop Interview Questions
Questions Answers Views Company eMail

What is the functionality of Query Processor in Apached Hive ?

 757

Explain Data Type Conversion in Hive?

 767

Explain SHOW and DESCRIBE Commands in Hive?

 798

What are the views in Hive?

 701

What are the different Primitive Data Types available in Hive?

 733

Are there any problems which can only be solved by MapReduce and cannot be solved by PIG? In which kind of scenarios MR jobs will be more useful than PIG?

 825

When to choose "Internal Table" in Hive?

 761

What are the different parts of Hive ?

 824

What are the types of tables in Hive?

 783

Does Hive support record level Insert, delete or update?

 737

Explain what is a Hive variable. What do we use it for?

 753

Double type in Hive - Important points?

 723

TRIM function in Hive with example?

 772

What is different table structure available in the hive?

 715

How can you add a new partition for the month December in the above partitioned table?

 718

Un-Answered Questions { Hadoop }

State the usage of 'filters', 'group' , 'orderBy', 'distinct' keywords in pig scripts?

698

What is cloudera and why it is used?

842

What is the significance of using –compress-codec parameter?

5

What is the purpose of DataNode block scanner?

1017

What do you understand by mapreduce?

701

How much space will the split occupy in Mapreduce?

729

What is hadoop sqoop?

5

How many Mappers run for a MapReduce job?

664

Describe HDFS Federation?

52

Why is flume used?

76

Which command do we use to insert data in HCatalog?

5

Why do we need MapReduce during Pig programming?

713

How hbase uses zookeeper?

1

Does impala use caching?

44

Can you explain how it is different from doing machine learning in r or sas?

37

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