What is TaskTracker?

524

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Give a brief overview of Hadoop history?

468

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How Big is ‘Big Data’?

463

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

504

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

518

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What are some of the characteristics of Hadoop framework?

489

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Where are Hadoop’s configuration files located?

551

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Can you give a detailed overview about the Big Data being generated by Facebook?

484

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How to remove safemode of namenode forcefully in HDFS?

44

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Who divides the file into Block while storing inside hdfs in hadoop?

57

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What are file permissions in HDFS? how does HDFS check permissions for files/directory?

64

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How one can change Replication factor when Data is already stored in HDFS

51

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Explain HDFS “Write once Read many” pattern?

44

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Why is block size set to 128 MB in HDFS?

77

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What should be the HDFS Block size to get maximum performance from Hadoop cluster?

43

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