a) Config b) Configuration c) OutputConfig d) None of the mentioned Answer: b Explanation: Configurations are specified ...
View Question______________ is percentage of memory relative to the maximum heap size in which map outputs may be retained during the reduce.
a) mapred.job.shuffle.merge.percent b) mapred.job.reduce.input.buffer.percen c) mapred.inmem.merge.threshold d) io.sort.factor Answer: b Explanation: When the reduce begins, map outputs ...
View QuestionWhich of the following parameter is the threshold for the accounting and serialization buffers?
a) io.sort.spill.percent b) io.sort.record.percent c) io.sort.mb d) None of the mentioned Answer: a Explanation: When the percentage ...
View QuestionMaximum virtual memory of the launched child-task is specified using _________
a) mapv b) mapred c) mapvim d) All of the mentioned Answer: b Explanation: Admins can also ...
View QuestionThe ___________ executes the Mapper/ Reducer task as a child process in a separate jvm.
a) JobTracker b) TaskTracker c) TaskScheduler d) None of the mentioned Answer: a Explanation: The child-task inherits ...
View Question__________ is the primary interface for a user to describe a MapReduce job to the Hadoop framework for execution.
a) JobConfig b) JobConf c) JobConfiguration d) All of the mentioned Answer: b Explanation: JobConf is typically ...
View QuestionPoint out the wrong statement.
a) It is legal to set the number of reduce-tasks to zero if no reduction is desired b) ...
View Question____________ is a generalization of the facility provided by the MapReduce framework to collect data output by the Mapper or the Reducer.
a) OutputCompactor b) OutputCollector c) InputCollector d) All of the mentioned Answer: b Explanation: Hadoop MapReduce comes ...
View QuestionWhich of the following partitions the key space?
a) Partitioner b) Compactor c) Collector d) All of the mentioned Answer: a Explanation: Partitioner controls the ...
View QuestionPoint out the correct statement.
a) The right number of reduces seems to be 0.95 or 1.75 b) Increasing the number of reduces ...
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