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?

155

Explain what is a column family in cassandra?

124

what is a cluster in cassandra?

103

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?

223

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?

132

What are secondary indexes?

101

Un-Answered Questions { Hadoop }

Difference Between Hadoop and HDFS?

What is the stable version of Hive ?

2663

If a data Node is full how it's identified?

984

Is Apache Kafka is a distributed streaming platform? if yes, what you can do with it?

676

What are the components of Spark Ecosystem?

317

Define the consistency levels for read operations in Cassandra?

Ideally what should be replication factor in a Hadoop cluster?

552

How to enable recycle bin or trash in hadoop?

734

What is spark table?

278

How is the distance between two nodes defined in Hadoop?

1498

What are the actions in spark?

293

How to Alter Hive Database?

775

Can we create a hadoop cluster from scratch?

474

How to insert records in apache tajo?

What is the history of apache mahout? Once did it start?

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