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?

622

Un-Answered Questions { Hadoop }

What are the different data formats supported by apache tajo?

Explain textFile Vs wholeTextFile in Spark?

440

Can you define what is Event Serializer in Flume?

What are the purposes of using Ambari shell?

What is the need for Spark DAG?

319

When can you use ALTER KEYSPACE?

What does /var/hadoop/pids do?

1324

Whats the default port that jobtrackers listens ?

509

In how many ways RDDs can be created? Explain.

313

Who invented the first spark plug?

242

What is Directed Acyclic Graph(DAG)?

326

Where is table data stored in Apache Hive by default?

851

How to optimize MapReduce Job?

688

Hadoop Libraries and Utilities and Miscellaneous Hadoop Applications?

1117

Difference between Sqoop and Cassandra?

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