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Hadoop General Interview Questions
Questions Answers Views Company eMail

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

 326

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

 327

What is the block size in Hadoop?

 303

Can you give some examples of Big Data?

 338

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

 363

What is streaming in Hadoop?

 312

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

 340

What is streaming access?

 361

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

 335

Give examples of some companies that are using Hadoop structure?

 314

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

 353

How analysis of Big Data is useful for organizations?

 355

What does the file hadoop-metrics.properties do?

 363

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?

 341

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

 328

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Un-Answered Questions { Hadoop General }

What is job tracker in Hadoop?

362

Can you explain bloommapfile.

338

In which directory hadoop is installed?

296

How would you restart NameNode?

286

What is the difference between TextinputFormat and KeyValueTextInputFormat class?

323

Explain the core methods of the reducer?

357

What does hadoop-metrics.properties file do?

348

Explain what is namenode in hadoop?

315

Why Hadoop performs replication, although it results in data redundancy?

1124

What are the tools used in big data?

295

What do you understand by a closure in scala?

350

According to IBM, what are the three characteristics of Big Data?

318

In which location name node sores its metadata and why?

422

What are the Features of Hadoop?

318

Explain Hadoop Archives?

356

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