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

Explain what is cassandra?

List out the other components of cassandra?

What is the use of cassandra and why to use cassandra?

144

Explain what is a column family in cassandra?

115

what is a cluster in cassandra?

what are the main components of cassandra data model?

what is composite type in cassandra?

what are the values stored in the cassandra column?

When to use secondary indexes?

What are the benefits of NoSQL over relational database?

215

I have a row or key cache hit rate of 0.XX123456789 reported by JMX. Is that XX% or 0.XX% ?

When to avoid secondary indexes?

What ports does Cassandra use?

When should you not use Cassandra? OR When to use RDBMS instead of Cassandra?

124

What are secondary indexes?

Un-Answered Questions { Hadoop }

Can you tell us more about ssh?

673

Mention what is the meaning of broker in kafka?

472

Can you define udf?

396

What are the filters are available in apache hbase?

150

What is the need of MapReduce?

583

How do I load a big csv file into a partitioned table?

What is the difference between kafka and mq?

469

How to create a Sparse vector from a dense vector?

334

What are the different execution mode available in Pig?

1014

Give some points of hive for hadoop ?

671

Is kafka a message queue?

516

What are the types of traditional method of message transfer?

560

How is transformation on rdd different from action?

328

Is apache flume real time processing framework?

Can you tell us how many daemon processes run on a hadoop system?

547

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