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

how is a file of the size 1 GB uncompressed

931

Is map like a pointer?

918

What is the default replication factor?

988

What should be the ideal replication factor in Hadoop Cluster?

2 3109

How can one increase replication factor to a desired value in Hadoop?

1120

In Map Reduce why map write output to Local Disk instead of HDFS?

903

What is a Record Reader in hadoop?

957

What is version-id mismatch error in hadoop?

1055

how to share the metastore within multiple users?

918

What is a partitioner and how the user can control which key will go to which reducer?

939

Hive for Hadoop - Give some points?

1 2038

How do you define "block" in HDFS?

899

Where is the Mapper Output intermediate kay-value data stored ?

1354

How does Mappers run method works?

893

What are the components of Apache Pig platform?

747

Un-Answered Questions { Hadoop }

How spark is used in hadoop?

287

What are the collection data types provided by CQL?

How to debug Hadoop code?

536

What is different table structure available in the hive?

659

How does apache flume work?

132

How to create directory in HDFS?

List few differences between apache kafka and rabbitmq?

569

Explain transformation in rdd. How is lazy evaluation helpful in reducing the complexity of the system?

346

What is Column Family in Cassandra?

100

How to Containerizing ZooKeeper With Docker?

Where is the output of Mapper written in Hadoop?

772

Why is Spark RDD immutable?

370

In the Producer, when does QueueFullException occur?

552

What is a column family?

Explain what is a sequence file in hadoop?

467

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