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 type of data hadoop can handle ?

472

What does the high availability of a name-node means?

474

What does block mean?

479

What do you think about the speculative execution?

479

What did mean by data-node?

470

How to use combiner in hadoop ?

478

Mention what is the data storage component used by hadoop?

482

Mention what does the text input format do?

450

Mention what daemons run on a master node and slave nodes?

509

Explain what is namenode in hadoop?

474

Explain what is a sequence file in hadoop?

513

Mention how many inputsplits is made by a hadoop framework?

613

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

447

Explain is it possible to search for files using wildcards?

523

Explain what is hadoop?

464

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Un-Answered Questions { Hadoop General }

What is the use of recordreader in hadoop?

457

What does name-node mean in hadoop?

511

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

546

What is Federation?

457

Can we create a hadoop cluster from scratch?

474

What is job tracker role in hadoop?

516

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

593

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

465

What happens if the number of reducers is 0 in Hadoop?

511

What is Mapper? How can we compress Mapper output in Hadoop?

551

What is Fault Tolerance?

566

How can we create a hadoop cluster from scratch?

460

Explain the core methods of the reducer?

542

What is Combiner in Hadoop?

570

Mention how hadoop is different from other data processing tools?

446

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