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Hortonworks-Certified-Apache-Hadoop-2.0-Developer(Pig and Hive Developer) Sample Questions:

1. Your client application submits a MapReduce job to your Hadoop cluster. Identify the Hadoop daemon on
which the Hadoop framework will look for an available slot schedule a MapReduce operation.

A) JobTracker
B) Secondary NameNode
C) NameNode
D) TaskTracker
E) DataNode

2. What are the TWO main components of the YARN ResourceManager process? Choose 2 answers

A) Task Tracker
B) Scheduler
C) Applications Manager
D) Job Tracker

3. Which one of the following statements is true regarding a MapReduce job?

A) The job's Partitioner shuffles and sorts all (key.value) pairs and sends the output to all reducers
B) The Mapper must sort its output of (key.value) pairs in descending order based on value
C) The reduce method is invoked once for each unique value
D) The default Hash Partitioner sends key value pairs with the same key to the same Reducer

4. 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) When submitting the job on the command line, specify the -libjars option followed by the JAR file path.
D) 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.

5. What does Pig provide to the overall Hadoop solution?

A) C++ interface to MapReduce and data warehouse infrastructure
B) Database table and storage management services
C) Simple scripting language for writing MapReduce programs
D) Legacy language Integration with MapReduce framework

Solutions: