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

961

Is map like a pointer?

948

What is the default replication factor?

1021

What should be the ideal replication factor in Hadoop Cluster?

2 3200

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

1150

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

948

What is a Record Reader in hadoop?

1008

What is version-id mismatch error in hadoop?

1082

how to share the metastore within multiple users?

960

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

997

Hive for Hadoop - Give some points?

1 2092

How do you define "block" in HDFS?

959

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

1408

How does Mappers run method works?

939

What are the components of Apache Pig platform?

786

Un-Answered Questions { Hadoop }

What is spark reducebykey?

289

What is a tuple in pig?

592

What is the use of map transformation?

324

What are Guarantees provided by Kafka?

548

What is a commodity hardware? Does commodity hardware include RAM?

554

Is a distributed machine learning framework on top of spark?

352

explain the key features of Apache Spark?

355

What are consumers in kafka?

574

Explain various Apache Spark ecosystem components. In which scenarios can we use these components?

397

What are the differences between a node, a cluster, and datacenter in Cassandra?

What is the use of context object?

504

How do I download and install spark?

319

What is namenode?

518

Explain the process to trigger automatic clean-up in Spark to manage accumulated metadata.

325

Can you explain about the cluster manager of apache spark?

276

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