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 different commands used to startup and shutdown Hadoop daemons?

527

What is configured in /etc/hosts and what is its role in setting Hadoop cluster?

528

How is the splitting of file invoked in Hadoop framework?

513

Is it possible to provide multiple input to Hadoop? If yes then how?

502

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

452

What is the default replication factor and how will you change it?

533

Explain Hadoop Archives?

538

Explain the Single point of Failure in Hadoop?

477

Explain Erasure Coding in Hadoop?

507

What is Disk Balancer in Hadoop?

513

How would you check whether your NameNode is working or not?

420

Is Namenode machine same as DataNode machine as in terms of hardware?

461

If DataNode increases, then do we need to upgrade NameNode?

551

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

481

Why is Data Block size set to 128 MB in Hadoop?

439

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Un-Answered Questions { Hadoop General }

Clarify how job tracker schedules an assignment?

419

What do you mean by the NameNode High Availability in hadoop?

495

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

495

What is the difference between an inputsplit and a block?

634

In which location name node sores its metadata and why?

672

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

428

How can we create a hadoop cluster from scratch?

423

What is Chain Mapper?

564

What are the common types of NOSQL data bases ?

445

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

547

How does hadoop achieve fault tolerance?

416

Define a udf?

423

Clarify what webdav is in hadoop?

471

What is Federation?

419

Explain the difference between an inputsplit and a block?

434

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