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Hortonworks Apache-Hadoop-Developer Exam Syllabus Topics:

Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

1. A combiner reduces:

A) The amount of intermediate data that must be transferred between the mapper and reducer.
B) The number of output files a reducer must produce.
C) The number of input files a mapper must process.
D) The number of values across different keys in the iterator supplied to a single reduce method call.

2. 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) 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.
C) When submitting the job on the command line, specify the -libjars option followed by the JAR file path.
D) Package your code and the Apache Commands Math library into a zip file named JobJar.zip

3. In Hadoop 2.0, which one of the following statements is true about a standby NameNode?
The Standby NameNode:

A) Runs on the same machine and shares the memory of the active NameNode.
B) Communicates directly with the active NameNode to maintain the state of the active NameNode.
C) Processes all client requests and block reports from the appropriate DataNodes.
D) Receives the same block reports as the active NameNode.

4. Review the following data and Pig code:

What command to define B would produce the output (M,62,95l02) when invoking the DUMP operator on B?

A) B = FILTER A BY (zip = = '95102' AND gender = = M");
B) B = JOIN A BY (gender = = 'M' AND zip = = '95102');
C) B= FOREACH A BY (gender = = 'M' AND zip = = '95102');
D) B= GROUP A BY (zip = = '95102' AND gender = = 'M');

5. Which of the following tool was designed to import data from a relational database into HDFS?

A) Flume
B) Ambari
C) Sqoop
D) HCatalog

Solutions: