最新のHADOOP-PR000007問題集で試験を準備する

Hortonworks HADOOP-PR000007 試験概要:

Hortonworks HADOOP-PR000007 試験シラバストピック:

Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) 認定 HADOOP-PR000007 試験問題：

1. Which one of the following statements describes a Pig bag. tuple, and map, respectively?

A) Ordered set of fields, ordered collection of tuples, ordered collection of maps
B) Ordered collection of maps, ordered collection of bags, and unordered set of key/value pairs
C) Unordered collection of maps, ordered collection of tuples, ordered set of key/value pairs
D) Unordered collection of tuples, ordered set of fields, set of key value pairs

2. In a MapReduce job, you want each of your input files processed by a single map task. How do you
configure a MapReduce job so that a single map task processes each input file regardless of how many
blocks the input file occupies?

A) Increase the parameter that controls minimum split size in the job configuration.
B) Write a custom MapRunner that iterates over all key-value pairs in the entire file.
C) Write a custom FileInputFormat and override the method isSplitable to always return false.
D) Set the number of mappers equal to the number of input files you want to process.

3. You 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 is
the best way to make this library available to your MapReducer job at runtime?

A) Have your system administrator place the JAR file on a Web server accessible to all cluster nodes and
then set the HTTP_JAR_URL environment variable to its location.
B) Package your code and the Apache Commands Math library into a zip file named JobJar.zip
C) Have your system administrator copy the JAR to all nodes in the cluster and set its location in the
HADOOP_CLASSPATH environment variable before you submit your job.
D) When submitting the job on the command line, specify the -libjars option followed by the JAR file path.

4. The Hadoop framework provides a mechanism for coping with machine issues such as faulty
configuration or impending hardware failure. MapReduce detects that one or a number of machines are
performing poorly and starts more copies of a map or reduce task. All the tasks run simultaneously and
the task finish first are used. This is called:

A) Combine
B) IdentityMapper
C) IdentityReducer
D) Default Partitioner
E) Speculative Execution

5. Review 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 would save the results of B to a folder in hdfs named myoutput?

A) DUMP B INTO 'myoutput';
B) STORE B INTO 'myoutput';
C) DUMP B using PigStorage('myoutput');
D) STORE A INTO 'myoutput' USING PigStorage(',');

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