EMERGING TRENDS IN SOFTWARE ENGINEERING
CLOUD COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Consider the following statements:Statement 1:The Job Tracker is hosted inside the master and it receives the job execution request from the client.Statement 2:Task tracker is the MapReduce component on the slave machine as there are multiple slave machines.
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Only statement 1 is true
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Only statement 2 is true
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Both statements are true
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Both statements are false
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Explanation:
Detailed explanation-1: -HDFS Namenode stores meta-data i.e. number of data blocks, file name, path, Block IDs, Block location, no. of replicas, and also Slave related configuration. This meta-data is available in memory in the master for faster retrieval of data.
Detailed explanation-2: -Statement 1: Volatility refers to the data velocity relative to timescale of event being studied. Statement 2: Viscosity refers to the rate of data loss and stable lifetime of data.
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