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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Mention what is distributed cache in hadoop?

440

Explain how can you debug hadoop code?

472

Explain how can you check whether namenode is working beside using the jps command?

433

Explain what is webdav in hadoop?

510

Mention what job does the conf class do?

424

For using hadoop list the network requirements?

471

Mention what is data cleansing?

441

What is a udf?

450

What is a record reader?

411

List out the different stream grouping in apache storm?

383

List out the some common problems faced by data analyst?

412

Why cloudera is used?

479

What are the benefits yarn brings in to hadoop?

426

Define “speculative execution” in hadoop?

427

What are the port numbers of job tracker?

525

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Un-Answered Questions { Hadoop General }

What does rack awareness mean?

413

What is a record reader?

411

Comparison between Secondary NameNode and Checkpoint Node in Hadoop?

505

Is there another way to check whether Namenode is working?

405

Clarify what jobtracker is in hadoop? What are the activities followed by hadoop?

428

Can you explain rack awareness?

435

Clarify what is sqoop in hadoop?

419

What is structured and unstructured data?

450

What happens if one hadoop client renames a file or a directory containing this file while another client is still writing into it?

446

Can hadoop replace relational database?

428

Did you ever ran into a lop sided job that resulted in out of memory error, if yes then how did you handled it ?

442

Compare Hadoop and RDBMS?

413

Can hadoop handle streaming data?

464

Is it possible to have hadoop job output in multiple directories? If yes, how?

452

How can you set an arbitrary number of Reducers to be created for a job in Hadoop?

476

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