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

Name the examples of some companies that are using hadoop structure?

701

What is structured data?

660

Define streaming access?

675

Define fault tolerance?

665

What do sorting do?

695

What is nlineoutputformat?

685

Explain why do we need hadoop?

672

Explain the features of pseudo mode?

712

What do shuffling do?

683

Explain the basic difference between traditional rdbms and hadoop?

660

Explain what if rack 2 and datanode fails?

649

Define a job tracker?

710

Explain the features of fully distributed mode?

632

What are the characteristics of hadoop framework?

675

Explain how can we change the split size if our commodity hardware has less storage space?

657

Un-Answered Questions { Hadoop }

Which scala library is used for functional programming?

471

Explain coalesce operation in Apache Spark?

327

What is Spark SQL?

308

Name the languages which are supported by apache spark and which one is most popular?

281

Explain some Disadvantages of Avro?

What is kafka technology?

521

What is nagios is used in ambari?

109

How does pig work?

606

What is dag spark?

329

Describe coalesce() operation. When can you coalesce to a larger number of partitions? Explain.

331

If data is present in HDFS and RF is defined, then how can we change Replication Factor?

What are the different life cycle commands in ambari?

Explain process to access sub directories recursively in hive queries.

908

Which are the three main hdfs-site.xml properties?

671

What file systems Spark support?

350

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