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

What is BloomMapFile?

771

Highlight the difference between group and Cogroup operators in Pig?

909

How would you diagnose or do exception handling in the pig?

1007

What are the relation operations in Pig? Explain any two with examples?

759

Differentiate between Pig Latin and Pig Engine?

888

What is the function of co-group in Pig?

820

Explain about the scalar datatypes in Apache Pig?

967

Explain the uses of PIG?

1008

What are the complex datatypes in pig?

1023

What does illustrate do in Apache Pig?

966

What is UDF?

958

What are the different types of UDF's in Java supported by Apache Pig?

1091

What is the usage of foreach operation in Pig scripts?

912

How will you merge the contents of two or more relations and divide a single relation into two or more relations?

970

What is the MapReduce plan in pig architecture?

1099

Un-Answered Questions { Hadoop }

How does spark work with python?

315

What are the different Primitive Data Types available in Hive?

733

What happens when the node running the map task fails before the map output has been sent to the reducer?

698

What is the difference between Apache Hadoop and RDBMS?

853

When to avoid secondary indexes?

If I create a folder in HDFS, will there be metadata created corresponding to the folder? If yes, what will be the size of metadata created for a directory?

What is Ambari shell?

What is a namenode? How many instances of namenode run on a hadoop cluster?

694

How hive can improve performance with orc format tables?

774

What is dataframe in spark?

302

How does hadoop achieve fault tolerance?

453

Explain the key benefits of using storm for real time processing?

463

Does this lead to security issues?

775

What is the difference between Primary, Partition and Cassandra ?

What are the particular functionalities of Nagios in Ambari?

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