What data does a Reducer reduce method process?
What data does a Reducer reduce method process?A . All the data in a single input file.B . All data produced by a single mapper.C . All data for a given key, regardless of...
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What does the following command do?
January 22, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-22T03:09:13+00:00What does the following command do? register '/piggyban):/pig-files.jar';A . Invokes the user-defined functions contained in the jar fileB . Assigns a name to a user-defined function or streaming commandC . Transforms Pig user-defined functions...
A combiner reduces:
January 20, 2021PdfprepApache Hadoop DeveloperHCAHD, Apache Hadoop Developer exam questions, Apache Hadoop Developer practice exam
Pdfprep2021-01-20T18:12:39+00:00A combiner reduces:A . The number of values across different keys in the iterator supplied to a single reduce method call.B . The amount of intermediate data that must be transferred between the mapper...
Determine which best describes when the reduce method is first called in a MapReduce job?
January 18, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-18T04:20:24+00:00Determine 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...
Which HDFS command uploads a local file X into an existing HDFS directory Y?
January 18, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-18T03:03:37+00:00Which HDFS command uploads a local file X into an existing HDFS directory Y?A . hadoop scp X YB . hadoop fs -localPut X YC . hadoop fs-put X YD . hadoop fs -get...
Which one of the following commands would save the results of B to a folder in hdfs named myoutput?
January 17, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-17T16:47:43+00:00Review the following data and Pig code. M,38,95111 F,29,95060 F,45,95192 M,62,95102 F,56,95102 A = LOAD 'data' USING PigStorage('.') as (gender:Chararray, age:int, zlp:chararray); B = FOREACH A GENERATE age; Which one of the following commands...
Which mode of operation in Hadoop allows you to most closely simulate a production cluster while using a single machine?
January 17, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-17T13:37:53+00:00You want to run Hadoop jobs on your development workstation for testing before you submit them to your production cluster. Which mode of operation in Hadoop allows you to most closely simulate a production...
Which process describes the lifecycle of a Mapper?
January 14, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-14T12:38:15+00:00Which process describes the lifecycle of a Mapper?A . The JobTracker calls the TaskTracker’s configure () method, then its map () method and finally its close () method.B . The TaskTracker spawns a new...
Which one of the following statements describes a Pig bag. tuple, and map, respectively?
January 14, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-01-14T04:06:26+00:00Which one of the following statements describes a Pig bag. tuple, and map, respectively?A . Unordered collection of maps, ordered collection of tuples, ordered set of key/value pairsB . Unordered collection of tuples, ordered...