What sorts of actions does the job tracker process perform?

421

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

491

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

464

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What is the block size in Hadoop?

432

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Can you give some examples of Big Data?

468

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

471

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What is streaming in Hadoop?

432

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

515

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What is streaming access?

489

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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?

465

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How analysis of Big Data is useful for organizations?

458

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What does the file hadoop-metrics.properties do?

486

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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?

452

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