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

What is the difference between leader and follower in kafka?

560

Please explain apache kafka?

535

What is kafka message?

502

In which language apache kafka is written?

534

Explain the format of an apache kafka message?

482

Explain what do you understand by cassandra- cql collections?

Explain the various types of partitioners in cassandra?

Differentiate between the terms: node, a cluster, and data center in cassandra?

What do you mean by column family?

What do you mean by ss table and explain how it is different from the other original tables?

Explain how it is different from the other original tables?

Explain the concept of cassandra data model?

114

Explain the memtable in cassandra?

What do you understand by cassandra?

What do you understand by the term snitch in cassandra?

Un-Answered Questions { Hadoop }

Why HDFS stores data using commodity hardware despite the higher chance of failures?

Give examples of the SerDe classes whihc hive uses to Serializa and Deserilize data?

736

List the network requirements for using Hadoop ?

627

What are the majorly used commands in sqoop?

What are some of the characteristics of Hadoop framework?

438

What is Spark SQL?

306

What is compute and Storage nodes?

1024

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

442

What is dag – directed acyclic graph?

300

Differentiate HDFS & HBase?

Define the management tools in Cassandra?

What is the difference between hbase and hdfs?

171

How can I improve my spark performance?

286

When we send a data to a node, do we allow settling in time, before sending another data to that node?

490

What is SuperColumn in Cassandra?

109

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