What sorts of actions does the job tracker process perform?

422

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

497

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

466

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What is the block size in Hadoop?

438

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Can you give some examples of Big Data?

479

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

475

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What is streaming in Hadoop?

442

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

519

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What is streaming access?

500

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

476

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Give examples of some companies that are using Hadoop structure?

440

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

470

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How analysis of Big Data is useful for organizations?

466

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What does the file hadoop-metrics.properties do?

488

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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?

456

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