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

Is client the end user in HDFS?

1008

Can the balancer be run while Hadoop is in use?

1013

Explain the difference between NameNode

973

What is the utility of using Writable Comparable Custom Class in Map Reduce code?

1047

Explain about Hive Buckets with Example ?

2 2658

What other technologies have you used in hadoop sta ck?

1016

what is difference between int and intwritable?

1513

What is Apache Hadoop YARN?

1495

What is a JobTracker in Hadoop? How many instances of JobTracker run on a Hadoop Cluster?

1144

What are channel selectors?

1083

What are the stable versions of Hadoop?

1056

Input Split & Record Reader and what they do?

1077

what is the default replication factor in HDFS?

1052

What is the core of the job in MapReduce framework?

899

How indexing is done in HDFS?

1143

Un-Answered Questions { Hadoop }

How to create an rdd?

308

What are the modes in which Apache Hadoop run?

834

How can you connect an application, if you run hive as a server?

752

What is Apache Pig?

864

What are the main components of Cassandra data models?

119

What is mapper in map reduce?

695

How is Ambari different from ZooKeeper?

Is Hive supports Temporary Tables?

1055

Name Applications and Use Cases of HCatalog?

What is the use of HColumnDescriptor class?

196

Who are ‘Data Scientists’?

457

Compare Hadoop and RDBMS?

452

How does master slave architecture in the hadoop?

879

How many Mappers run for a MapReduce job in Hadoop?

653

Is spark distributed computing?

316

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