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

List Hadoop’s three configuration files?

455

What is Distributed Cache in Hadoop?

500

What is the relationship between Jobs and Tasks in Hadoop?

651

Who are ‘Data Scientists’?

458

Tell me some major benefits of Hadoop?

454

What is structured and unstructured data?

496

According to IBM, what are the three characteristics of Big Data?

474

Which port does SSH work on?

433

Is there another way to check whether Namenode is working?

456

What is the NameNode port number?

433

Give me an example of document database ?

529

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

487

What are the four modules that make up the Apache Hadoop framework?

594

How does job tracker schedule a job for the task tracker?

489

What is 'jps'?

468

Un-Answered Questions { Hadoop }

What is the command to start and stop the Spark in an interactive shell?

329

Why Avro?

What is the purpose of textinputformat?

745

What is nlineoutputformat?

719

Why do we need Hadoop?

565

Should the region server be located on all DataNodes?

447

What are the limitations of Hive?

1069

What is Hadoop Custom partitioner ?

1047

What is yarn in hadoop?

716

Can multiple clients write into an HDFS file concurrently?

Who should learn Apache Ambari?

How data or file is written into Hadoop HDFS?

What is wal and hlog in hbase?

317

Explain how you can reduce churn in isr? When does broker leave the isr?

813

What will be the output of cast ('XYZ' as INT)?

724

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