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?

933

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

1060

Name some companies that use Hadoop?

Airtel,

955

what is hadoop archive?

921

Rack awareness of Namenode?

854

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

1063

How is the distance between two nodes defined in Hadoop?

1455

What is bucketing in Hive?

1 2066

What is speculative execution in Hadoop?

1051

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

1342

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

955

What are the problems with Hadoop 1.0?

1048

what are the nodes in the Hadoop cluster?

1045

What are the differences between Hive and RDBMS?

1 2353

What Mapper does?

984

Un-Answered Questions { Hadoop }

What language is apache spark?

288

How to set up local repository manually?

Name the languages which are supported by apache spark and which one is most popular?

279

What are the modes in which Apache Hadoop run?

800

Is it possible to provide multiple input to Hadoop? If yes then how?

502

What is the difference between apache mahout and prediction.io ?

What is compaction in hbase?

171

What are Watches in ZooKeeper?

Please provide an explanation on DStream in Spark.

282

Explain about the different complex data types in Pig?

652

When is it suggested to use a combiner in a MapReduce job?

636

What are the various uses of explode hive?

678

What is High Availability feature in Hadoop2?

440

What mode(s) can hadoop code be run in?

459

Can you define rdd?

307

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