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

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1018

What is difference between regular file system and HDFS?

1004

What is rack-aware replica placement policy?

984

What is Hadoop?

1 1564

Are Namenode and job tracker on the same host?

1413

What are the limitations of Hive?

989

Which company initially developed Hive ?

1 2348

What is column families? What happens if you alter the block size of ColumnFamily on an already populated database?

1072

What are the components of Hive architecture?

1078

What is HDFS Federation?

936

What are watches?

990

Explain the Job OutputFormat?

922

Virtual Box & Ubuntu Installation?

937

What is the difference between HDFS and NAS ?

1327

How Mapper is instantiated in a running job?

957

Un-Answered Questions { Hadoop }

how is a file of the size 1 GB uncompressed

880

What is graph db? Explain with an example.

Which classes are used by the hive to read and write hdfs files?

Explain why the name ‘hadoop’?

655

What are the most common OutputFormat in Hadoop?

524

How Sqoop word came? Sqoop is which type of tool and the main use of sqoop?

State some applications of HBase?

167

List down the segments of a hive question processor?

602

What is the role of Consumer API?

480

What are the primary phases of the reducer?

433

What are the design goals of zookeeper?

Does the HDFS go wrong? If so, how?

Is spark faster than hadoop?

343

Explain the various Transformation on Apache Spark RDD like distinct(), union(), intersection(), and subtract()?

279

What are the independent extensions that contributed to the ambari codebase?

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