What is the output of the following Pig commands?
Consider the following two relations, A and B. What is the output of the following Pig commands? X = GROUP A BY S1; DUMP X;A . Option AB . Option BC . Option CD...
Which two of the following statements are true about Pig’s approach toward data? Choose 2 answers
February 21, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-21T21:32:26+00:00Which two of the following statements are true about Pig's approach toward data? Choose 2 answersA . Accepts only data that has a key/value pair structureB . Accepts data whether it has metadata or...
When is the earliest point at which the reduce method of a given Reducer can be called?
February 19, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-19T19:31:15+00:00When is the earliest point at which the reduce method of a given Reducer can be called?A . As soon as at least one mapper has finished processing its input split.B . As soon...
Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?
February 19, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-19T05:50:01+00:00Which one of the following statements is FALSE regarding the communication between DataNodes and a federation of NameNodes in Hadoop 2.0?A . Each DataNode receives commands from one designated master NameNode.B . DataNodes send...
When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?
February 18, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-18T21:13:24+00:00When can a reduce class also serve as a combiner without affecting the output of a MapReduce program?A . When the types of the reduce operation’s input key and input value match the types...
Assuming the statements above execute successfully, which one of the following statements is true?
February 18, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-18T17:47:50+00:00Examine the following Hive statements: Assuming the statements above execute successfully, which one of the following statements is true?A . Each reducer generates a file sorted by ageB . The SORT BY command causes...
Curl -1 -L “http://host:port/webhdfs/v1/foo/bar?
February 18, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-18T15:12:21+00:00What does the following WebHDFS command do? Curl -1 -L “http://host:port/webhdfs/v1/foo/bar?op=OPEN”A . Make a directory /foo/barB . Read a file /foo/barC . List a directory /fooD . Delete a directory /foo/barView AnswerAnswer: B
How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapReduce?
February 17, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-17T21:55:02+00:00How are keys and values presented and passed to the reducers during a standard sort and shuffle phase of MapReduce?A . Keys are presented to reducer in sorted order; values for a given key...
All keys used for intermediate output from mappers must:
February 15, 2021PdfprepApache Hadoop DeveloperApache Hadoop Developer exam questions, Apache Hadoop Developer practice exam, HCAHD
Pdfprep2021-02-15T23:30:26+00:00All keys used for intermediate output from mappers must:A . Implement a splittable compression algorithm.B . Be a subclass of FileInputFormat.C . Implement WritableComparable.D . Override isSplitable.E . Implement a comparator for speedy sorting.View...
Which is the best way to make this library available to your MapReducer job at runtime?
February 13, 2021PdfprepApache Hadoop DeveloperHCAHD, Apache Hadoop Developer exam questions, Apache Hadoop Developer practice exam
Pdfprep2021-02-13T17:30:45+00:00You need to perform statistical analysis in your MapReduce job and would like to call methods in the Apache Commons Math library, which is distributed as a 1.3 megabyte Java archive (JAR) file. Which...