What are the common types of NOSQL data bases ?

487

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Is it possible to provide multiple input to Hadoop? If yes then how can you give multiple directories as input to the Hadoop job?

482

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How does speculative execution work in Hadoop?

493

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What is Federation?

469

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What is the difference between TextInputFormat and KeyValueInputFormat class?

557

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What is High Availability feature in Hadoop2?

490

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What is the command to change the replication factor ?

555

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What is JobTracker?

484

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How many datanodes can run on a single Hadoop cluster?

497

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What are some typical functions of Job Tracker?

489

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What is TaskTracker?

528

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Give a brief overview of Hadoop history?

472

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How Big is ‘Big Data’?

467

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

511

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How many job tracker processes can run on a single Hadoop cluster?

526

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