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

Hadoop General Interview Questions

Questions Answers Views Company eMail

What is Identity reducer?

523

What is Chain Mapper?

559

What are the core methods of a Reducer?

511

What are the parameters of mappers and reducers?

489

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

509

How is the splitting of file invoked in Hadoop ?

536

How many InputSplits will be made by hadoop framework?

492

Explain the usage of Context Object?

476

List Hadoop’s three configuration files?

421

What is Distributed Cache in Hadoop?

457

What is the relationship between Jobs and Tasks in Hadoop?

617

Who are ‘Data Scientists’?

415

Tell me some major benefits of Hadoop?

408

What is structured and unstructured data?

447

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

436

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Un-Answered Questions { Hadoop General }

What are the four basic parameters of a mapper?

567

What are some typical functions of Job Tracker?

428

How will you write a custom partitioner for a Hadoop job?

455

What are the limitations of Hadoop?

570

What are the restriction to the key and value class ?

432

Define data cleansing?

404

Is it possible to have hadoop job output in multiple directories?

444

List some use cases where classification machine learning algorithms can be used.

463

Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

430

Can you give some examples of Big Data?

474

What is fsck?

643

What is the use of context object?

466

Are job tracker and task trackers present in separate machines?

462

Give me the examples of Columnar database ?

586

List Hadoop’s three configuration files?

421

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