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

867

Is map like a pointer?

872

What is the default replication factor?

942

What should be the ideal replication factor in Hadoop Cluster?

2 2976

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

1076

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

864

What is a Record Reader in hadoop?

906

What is version-id mismatch error in hadoop?

1013

how to share the metastore within multiple users?

867

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

886

Hive for Hadoop - Give some points?

1 1957

How do you define "block" in HDFS?

848

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

1303

How does Mappers run method works?

836

What are the components of Apache Pig platform?

710

Un-Answered Questions { Hadoop }

Can you explain textinformat?

461

What is the no. Of threads created by impala?

How many ways can you create rdd in spark?

304

Why HDFS?

Explain bloom?

573

What is spark tool in big data?

263

What is a bag in pig?

580

How do Hadoop MapReduce works?

669

Explain Data Locality in Hadoop?

510

What are the main features of impala?

What is Flume?

106

Which Sorting algorithm is used in Hadoop MapReduce?

559

Explain REVERSE function in Hive with example?

717

What is zeromq?

489

List few differences between apache kafka and rabbitmq?

516

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