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?

480

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

465

How is the splitting of file invoked in Hadoop framework?

473

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

466

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

423

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

485

Explain Hadoop Archives?

487

Explain the Single point of Failure in Hadoop?

438

Explain Erasure Coding in Hadoop?

464

What is Disk Balancer in Hadoop?

454

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

387

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

429

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

516

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

458

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

411

Post New Hadoop General Questions

Un-Answered Questions { Hadoop General }

Can you explain bloommapfile.

427

What is Small File Problem in Hadoop? How can it be resolved?

491

When should be hadoop archive create?

393

What are the functionalities of jobtracer?

386

Define a record reader?

365

If the hadoop administrator needs to make a change, which configuration file does he need to change?

403

Compare Hadoop 2 and Hadoop 3?

379

What is the best practice to deploy the secondary name node?

418

Can hadoop handle streaming data?

427

Can you explain indexing?

384

What is the command to change the replication factor ?

452

What is JPS? Why is it used in Hadoop?

477

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

433

Can hadoop replace relational database?

390

Compare Apache Hadoop and Apache Spark?

405

For More Un-Answered { Hadoop General } Questions Click Here