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

Hadoop General Interview Questions

Questions Answers Views Company eMail

Explain the key benefits of using storm for real time processing?

462

What is the logistic regression?

475

Define data cleansing?

439

What are the port numbers of namenode?

466

How can we create a hadoop cluster from scratch?

460

What are the port numbers of task tracker?

488

How can you native libraries be included in yarn jobs?

472

Name the files which are used by the startup and shutdown commands?

1 992

Define a record reader?

448

What is the job tracker role in hadoop?

475

Explain how do you overwrite replication factor?

460

Explain how can we check whether namenode is working or not?

615

Define a udf?

465

Define a sequence file in hadoop?

577

Name the operating system(s) which are supported for production hadoop deployment?

473

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Un-Answered Questions { Hadoop General }

what is next step after mapper or maptask?

455

What is Identity reducer?

566

What is Rack Awareness? What is its need in Hadoop?

568

What are the different commands used to startup and shutdown Hadoop daemons?

583

What is Distributed Cache in Hadoop?

499

Explain the usage of Context Object?

517

What happen when namenode enters in safemode in hadoop?

468

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

516

What are the side effects of not running a secondary name node?

483

What are the restriction to the key and value class ?

463

Define a udf?

465

How do you overwrite replication factor?

488

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

526

Explain what is storage and compute nodes?

543

Mention what is distributed cache in hadoop?

471

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