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 the basic architecture of Hadoop?

888

On what basis name node distribute blocks across the data nodes?

997

Name some companies that use Hadoop?

Airtel,

910

what is hadoop archive?

880

Rack awareness of Namenode?

808

Have you ever used Counters in Hadoop. Give us an example scenario?

1011

How is the distance between two nodes defined in Hadoop?

1418

What is bucketing in Hive?

1 1973

What is speculative execution in Hadoop?

1017

How we can change Replication factor when Data is on the fly?

1297

What alternate way does HDFS provides to recover data in case a Namenode

903

What are the problems with Hadoop 1.0?

988

what are the nodes in the Hadoop cluster?

997

What are the differences between Hive and RDBMS?

1 2252

What Mapper does?

936

Un-Answered Questions { Hadoop }

What is the difference between hbase and hdfs?

165

What is spooldir flume?

What are the different file permissions in the HDFS for files or directory levels?

140

Explain what is sqoop in Hadoop ?

678

What is check pointing in hadoop?

398

What are the relational databases supported in sqoop?

What is simple strategy?

123

What is pre-requisites for contributing to apache mahout ?

What is Kundera in Cassandra?

What sorts of actions does the job tracker process perform?

380

Differentiate between piglatin and hiveql?

530

What is ObjectInspector functionality in Hive?

900

What are the different ways of representing data in Spark?

244

What are the main components of a Hadoop Application?

978

Is the following approach correct? Is the sqrt Of Sum Of Sq a valid reducer?

436

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