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

1. Which Two of the following statements are true about hdfs? Choose 2 answers

A) An HDFS file that is larger than dfs.block.size is split into blocks
B) HDFS works best when storing a large number of relatively small files
C) Blocks are replicated to multiple datanodes
D) Block sizes for all files must be the same size

2. For each intermediate key, each reducer task can emit:

A) One final key-value pair per value associated with the key; no restrictions on the type.
B) As many final key-value pairs as desired, but they must have the same type as the intermediate key-value pairs.
C) One final key-value pair per key; no restrictions on the type.
D) As many final key-value pairs as desired. There are no restrictions on the types of those key-value pairs (i.e., they can be heterogeneous).
E) As many final key-value pairs as desired, as long as all the keys have the same type and all the values have the same type.

3. Which YARN component is responsible for monitoring the success or failure of a Container?

A) JobTracker
B) ApplicationMaster
C) NodeManager
D) ResourceManager

4. Examine the following Hive statements:

Assuming the statements above execute successfully, which one of the following statements is true?

A) The contents of File1 are parsed as comma-delimited rows and stored in a database
B) The contents of File1 are parsed as comma-delimited rows and loaded into /user/joe/x/
C) Hive reformats File1 into a structure that Hive can access and moves into to/user/joe/x/
D) The file named File1 is moved to to/user/joe/x/

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

Solutions: