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

494

Name the most common Input Formats defined in Hadoop? Which one is default?

464

What is the block size in Hadoop?

435

Can you give some examples of Big Data?

474

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

473

What is streaming in Hadoop?

436

What is a commodity hardware? Does commodity hardware include RAM?

516

What is streaming access?

496

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

476

Give examples of some companies that are using Hadoop structure?

440

Which modes can Hadoop be run in? List a few features for each mode?

469

How analysis of Big Data is useful for organizations?

460

What does the file hadoop-metrics.properties do?

486

Hadoop achieves parallelism by dividing the tasks across many nodes, it is possible for a few slow nodes to rate-limit the rest of the program and slow down the program. What mechanism Hadoop provides to combat this?

456

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

455

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Un-Answered Questions { Hadoop General }

What is Identity reducer?

524

What is single node cluster in Hadoop? for what all purposes Hadoop run on a single node cluster?

540

What is fsck?

643

Name the most common input formats defined in hadoop?

443

Explain Data Locality in Hadoop?

537

What is the use of context object?

466

How to debug Hadoop code?

538

How jobtracker assign tasks to the tasktracker?

413

For using hadoop list the network requirements?

471

How is the splitting of file invoked in Hadoop framework?

513

What is meant by streaming access?

547

How ordering in hdfs is finished?

424

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

519

What is a combiner in hadoop?

510

What is Slot in Hadoop v1? Why was it removed from Hadoop v2?

515

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