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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Which port does SSH work on?

378

Is there another way to check whether Namenode is working?

368

What is the NameNode port number?

362

Give me an example of document database ?

430

What is the characteristic of streaming API that makes it flexible run MapReduce jobs in languages like Perl, Ruby, Awk etc.?

427

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

522

How does job tracker schedule a job for the task tracker?

427

What is 'jps'?

400

Explain about Hadoop file system and processing framework?

385

How Hadoop is cost-effective?

380

What does the mapred.job.tracker command do?

398

Is it possible to rename the output file, and if so, how?

427

What are the Hadoop features extended to its eco-system components ?

395

What is job tracker in Hadoop?

458

What sorts of actions does the job tracker process perform?

380

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Un-Answered Questions { Hadoop General }

What is the role of the secondary namenode?

409

Mention how many inputsplits is made by a hadoop framework?

533

What do you understand by standalone (or local) mode?

389

What is Distributed Cache in Hadoop?

412

What happen if number of reducer is set to 0 in Hadoop?

465

How Hadoop is cost-effective?

380

What is the difference between namenode and datanode in hadoop?

464

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

441

If datanodes increase, then do we need to upgrade namenode?

424

What do you know about yarn?

380

How analysis of Big Data is useful for organizations?

426

Why aggregation cannot be done in Mapper?

520

How to create the directory when name node is in safe mode?

502

What are the main components in Hadoop Eco-System and what are their functions ?

445

After the Map phase finishes, the Hadoop framework does 'Partitioning, Shuffle and sort'. Explain what happens in this phase?

437

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