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 }

What is the Use of Sqoop?

Is there any point of learning mapreduce, then?

646

What is contextual routing in flume?

818

When do you have to avoid secondary indexes?

Define Nodetool Utility?

Explain the term memtable?

Differentiate between hive and hbase?

761

What is spooldir flume?

Explain the processing speed difference between Hadoop and Apache Spark?

291

Why HDFS performs replication, although it results in data redundancy?

132

What bit version that ambari needs and also list out the operating systems that are compatible?

What is the relationship between Job and Task in Hadoop?

662

What is the use of "order by" in Hive?

964

What does the high availability of a name-node means?

427

Do we need to install scala for spark?

311

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