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Apache Hadoop Interview Questions
Questions Answers Views Company eMail

Explain why do we need hadoop?

 383

Explain the features of pseudo mode?

 412

What do shuffling do?

 375

Explain the basic difference between traditional rdbms and hadoop?

 393

Explain what if rack 2 and datanode fails?

 344

Define a job tracker?

 387

Explain the features of fully distributed mode?

 355

What are the characteristics of hadoop framework?

 367

Explain how can we change the split size if our commodity hardware has less storage space?

 380

Explain how is hadoop different from other data processing tools?

 393

Define a datanode?

 387

Is secondary namenode a substitute to the namenode?

 418

What is a secondary namenode?

 361

What is unstructured data?

 395

Explain the overview of hadoop history breifly?

 358

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Un-Answered Questions { Apache Hadoop }

Does Hadoop requires RAID?

651

what is SPF?

1212

What is Distributed Cache?

600

How would you use Map/Reduce to split a very large graph into smaller pieces and parallelize the computation of edges according to the fast/dynamic change of data?

412

What is oozie in hadoop?

404




What is Disk Balancer in Apache Hadoop?

433

What do you understand from Node redundancy and is it exist in hadoop cluster?

901

In cloudera there is already a cluster, but if I want to form a cluster on ubuntu can we do it?

415

Is it necessary to know java to learn hadoop?

370

What is Apache Hadoop? Why is Hadoop essential for every Big Data application?

528

What is 'Key value pair' in HDFS?

623

What is HDFS ? How it is different from traditional file systems?

623

How to resolve ioexception: cannot create directory, while formatting namenode in hadoop?

414

What is inputsplit in hadoop? Explain.

408

What is IdentityMapper?

639

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