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?

126

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?

666

What are the commonalities between pig and hive?

624

Un-Answered Questions { Hadoop }

Explain about the execution plans of a pig script?
or
differentiate between the logical and physical plan of an apache pig script?

522

what daemons run on a master node and slave nodes?

754

What are different String functions available in PIG?

627

What is SequenceFileInputFormat in Hadoop MapReduce?

672

Name some companies that are already using Spark Streaming?

282

What is a bloom filter?

170

What is the role of recordreader in hadoop mapreduce?

792

What are the different modes in which we can configure/install Hadoop?

584

When to use hadoop, hbase, hive and pig?

574

What is sqoop in Hadoop ?

748

What are the features of Pseudo mode?

549

Explain totuple function?

631

What happens when the data set exceeds available memory?

Which command do we use to show the version?

164

Explain JobConf in MapReduce.

854

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