EnsurepassQUESTION 31 Indentify the utility that allows you to create and run MapReduce jobs with any executable or script as the mapper and/or the reducer?   A. Oozie B. Sqoop C. Flume D. Hadoop Streaming E. mapred   Correct Answer: D Explanation: Hadoop streaming is a utility that comes with the Hadoop distribution. The utility allows you to create and run Map/Reduce jobs with any executable or script as the mapper and/or the reducer. Reference: http://hadoop.apache.org/common/docs/r0.20.1/streaming.html Read more [...]
Ensurepass  QUESTION 11 Workflows expressed in Oozie can contain:   A. Sequences of MapReduce and Pig. These sequences can be combined with other actions including forks, decision points, and path joins. B. Sequences of MapReduce job only; on Pig on Hive tasks or jobs. These MapReduce sequences can be combined with forks and path joins. C. Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with exception handlers but no forks. D. Iterntive Read more [...]
EnsurepassQUESTION 21 Determine which best describes when the reduce method is first called in a MapReduce job?   A. Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The programmer can configure in the job what percentage of the intermediate data should arrive before the reduce method begins. B. Reducers start copying intermediate key-value pairs from each Mapper as soon as it has completed. The reduce method is called only after all intermediate Read more [...]
EnsurepassQUESTION 1 You need to create a job that does frequency analysis on input data. You will do this by writing a Mapper that uses TextInputFormat and splits each value (a line of text from an input file) into individual characters. For each one of these characters, you will emit the character as a key and an InputWritable as the value. As this will produce proportionally more intermediate data than input data, which two resources should you expect to be bottlenecks?   A. Processor Read more [...]