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

Mention how many inputsplits is made by a hadoop framework?

577

Explain what is jobtracker in hadoop? What are the actions followed by hadoop?

408

Explain is it possible to search for files using wildcards?

478

Explain what is hadoop?

434

Explain what is sequencefileinputformat?

457

Mention how hadoop is different from other data processing tools?

409

Mention what are the most common input formats defined in hadoop?

442

Mention what is rack awareness?

381

Mention what is the difference between an rdbms and hadoop?

424

Mention what are the three modes in which hadoop can be run?

419

Explain how does hadoop classpath plays a vital role in stopping or starting in hadoop daemons?

614

Explain what is storage and compute nodes?

512

Explain how jobtracker schedules a task?

465

Explain what happens when hadoop spawned 50 tasks for a job and one of the task failed?

439

What happens in text format?

436

Un-Answered Questions { Hadoop }

What is the main purpose of HDFS fsck command?

1792

Name a few import control commands. How can Sqoop handle large objects?

Can you define inputsplit in hadoop?

468

What do you mean by metadata in Hadoop?

how Cassandra writes changed data into commitlog?

What is dag spark?

327

Apache Spark is a good fit for which type of machine learning techniques?

282

How to load data into table created in hive ?

695

Define Actions.

303

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

381

Which files are used by the startup and shutdown commands?

720

What is aws spark?

273

What is Balancer in Hadoop?

472

Explain the hadoop-core configuration?

693

What are the different types of data model?

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