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 HBase?

359

What happens to a NameNode that has no data?

1585

What is a Hive Metastore?

1 2046

How can an application connect to Hive run as a server?

1168

What is a heartbeat in HDFS?

917

What are sink processors?

911

What is the reason for creating a new metastore_db whenever Hive query is run from a different directory?

988

Does hadoop always require digital data to process?

1181

what is meaning Replication factor?

951

What is the purpose of RawComparator interface?

1128

Where is the Mapper Output stored?

1374

What is the function of ApplicationMaster?

966

What problems can be addressed by using Zookeeper?

941

Can there be no Reducer?

840

What is Hadoop streaming?

1046

Un-Answered Questions { Hadoop }

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

681

Can MapReduce program be written in any language other than Java?

928

What are the default read and write classes in Hive?

658

What is the difference between apache mahout and spark mllib ?

When should you use sequencefileinputformat?

662

Explain edge nodes in hadoop?

441

What is the difference between External and Internal Table in Hive?

730

Mention what is the data storage component used by hadoop?

446

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

Which companies are mostly using Hive ?

779

What is node in Cassandra?

Is kafka open source?

502

Describe Spark SQL?

342

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

What is map in apache spark?

277

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