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

How to write a query in Cassandra?

104

What is the significance of cluster class in Cassandra?

Explain how cassandra writes changed data into commitlog?

What is cluster in Cassandra data model?

What are the key points of data model of Cassandra?

What is Column Family in Cassandra?

100

Does cassandra support acid tractions?

Define the management tools in Cassandra?

State the differences between a node, a cluster and datacenter in Cassandra?

List the benefits of using Cassandra.

Define SSTable?

What OS Cassandra supports?

Name the management tools in Cassandra?

Is piglatin a strongly typed language? If yes, then how did you come to the conclusion?

631

What are the commonalities between pig and hive?

587

Un-Answered Questions { Hadoop }

Give examples of some companies that are using Hadoop structure?

440

How to create index statement in apache tajo?

How would you restart NameNode?

422

Explain what is logging in Cassandra?

what happens when namenode goes down during file read operation in hadoop?

591

what is the default replication factor in HDFS?

1017

What load do concurrent queries produce on the namenode?

Highlight the key differences between MapReduce and Apache Pig?

705

Explain what is Hive?

708

How namenode handles data node failures?

524

What happens in text format?

436

Name some Complex types of Data types, Avro Supports?

What is Writable & WritableComparable interface?

926

Explain what is hadoop?

434

What are configuration files in Hadoop?

521

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