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?

700

Highlight the difference between group and Cogroup operators in Pig?

789

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

928

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

683

Differentiate between Pig Latin and Pig Engine?

802

What is the function of co-group in Pig?

749

Explain about the scalar datatypes in Apache Pig?

849

Explain the uses of PIG?

961

What are the complex datatypes in pig?

939

What does illustrate do in Apache Pig?

889

What is UDF?

878

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

1016

What is the usage of foreach operation in Pig scripts?

839

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

899

What is the MapReduce plan in pig architecture?

1022

Un-Answered Questions { Hadoop }

How does job tracker schedule a job for the task tracker?

433

How can we create children / sub-znode?

What are the languages supported by apache spark and which is the most popular one?

1689

Explain the process to trigger automatic clean-up in Spark to manage accumulated metadata.

294

What happens if you alter the block size of a column family on an already occupied database?

214

Explain the Use of Hive?

660

What is sink processors?

Give a list of Collection data type in Cassandra?

Is reduce-only job possible in Hadoop MapReduce?

664

What is lineage graph in spark?

274

On what all basis can you differentiate rdd, dataframe, and dataset?

294

Is it possible to add or delete column families in a working group?

What are the key benefits of using storm for real time processing?

508

What is isr?

496

What do you know about the speculative execution?

433

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