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 RecordReader in a Map Reduce?

712

Define Writable data types in MapReduce?

716

What happens when a DataNode fails during the write process?

700

Compare RDBMS with Hadoop MapReduce.

680

what is a Task Tracker in Hadoop?

749

what are the most common input formats defined in Hadoop?

704

what daemons run on a master node and slave nodes?

754

What is Text Input Format?

716

what is WebDAV in Hadoop?

794

What platform and Java version is required to run Hadoop?

696

what are the three modes in which Hadoop can be run?

678

How data is spilt in Hadoop?

697

what is storage and compute nodes?

791

When Namenode is down what happens to job tracker?

756

what are the main configuration parameters that user need to specify to run Mapreduce Job ?

655

Un-Answered Questions { Hadoop }

What does job conf class do?

708

What are the port numbers of job tracker?

556

What is kafka technology?

551

Why does one remove or add nodes in a Hadoop cluster frequently?

737

The partition of hive table has been modified to point to a new directory location. Do I have to move the data to the new location or the data will be moved automatically to the new location?

1069

On what all basis can you differentiate rdd, dataframe, and dataset?

327

What is Apache Spark? What is the reason behind the evolution of this framework?

294

What are the functions of "Spark Core"?

309

What are the different ways you can use to secure a cluster using Ambari?

What do you understand by mapreduce?

699

What is Spark SQL?

325

What does name-node mean in hadoop?

512

Which channel type is faster in Flume?

124

What is a difference between an input split and hdfs block?

Who uses Cassandra?

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