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?

153

Explain what is a column family in cassandra?

124

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?

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?

128

What are secondary indexes?

Un-Answered Questions { Hadoop }

Is map like a pointer?

917

What are the benefits of Spark over MapReduce?

643

How to Rename a table in Hive

752

How HCatalog helps to capture processing states to enable sharing?

Is there a date data type in Hive?

743

What are the uses and applications of mahout ?

Why is spark fast?

295

Explain the difference between an hdfs block and input split?

Is hadoop open source?

718

Name the three layers, Ambari supports?

What is Ambari shell?

What are components of ambari tjat are important for automation and integration?

Do we need hadoop for spark?

297

Why do fires spark?

299

How should 'store' keyword is useful in pig scripts?

642

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