Hadoop General Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Hadoop General Interview Questions

Questions Answers Views Company eMail

Explain what is sequencefileinputformat?

458

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

Explain how is data partitioned before it is sent to the reducer if no custom partitioner is defined in hadoop?

445

Explain what is a task tracker in hadoop?

456

Explain what is speculative execution?

424

Explain what happens in text format?

573

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Un-Answered Questions { Hadoop General }

Explain what is a task tracker in hadoop?

456

What are the restriction to the key and value class ?

432

Is there another way to check whether Namenode is working?

403

What is structured and unstructured data?

447

Explain in which directory hadoop is installed?

469

What is the difference between an inputsplit and a block?

630

Explain how jobtracker schedules a task?

465

Explain Data Locality in Hadoop?

536

What is the job tracker role in hadoop?

426

What are some typical functions of job tracker in hadoop?

418

What happens when two clients try to access the same file in the hdfs?

455

Explain what is storage and compute nodes?

512

Why do the nodes are removed and added frequently in a hadoop cluster?

475

What are the core components of Hadoop?

508

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

554

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