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

Where do you specify the Mapper Implementation?

1019

What is the meaning of speculative execution in Hadoop? Why is it important?

1059

What is the InputFormat ?

1020

Command to format the NameNode?

936

Who is a 'user' in HDFS?

891

What is the meaning of the term "non-DFS used" in Hadoop web-console?

1308

did you maintain the hadoop cluster in-house or used hadoop in the cloud?

1018

What is DistributedCache and its purpose?

902

What is HDFS ? How it is different from traditional file systems?

918

What is HDFS Block size? How is it different from traditional file system block size?

1 1453

How you can contact your client everyday ?

974

What is Input Split in hadoop?

981

What is 'Key value pair' in HDFS?

962

How to keep HDFS cluster balanced?

1097

What is the port number for NameNode

839

Un-Answered Questions { Hadoop }

Which storage level does the cache () function use?

299

What is a generic udf in hive?

736

Can we run spark without hadoop?

291

Explain what is heartbeat in hdfs?

Explain what happens if, during the PUT operation, HDFS block is assigned a replication factor 1 instead of the default value 3?

When is it not recommended to use MapReduce paradigm for large

648

what is JobTracker in Hadoop? What are the actions followed by Hadoop?

769

What is heartbeat in hadoop?

426

What is struct and explain its purpose?

514

What is Hive Data Definition language?

971

What is the Internal Architecture of the Cassandra Database ?

What is the non dfs used?

555

What are the limitations of Apache Spark?

279

How do I optimize my spark code?

306

Where the mapper's intermediate data will be stored?

638

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