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

1. Given the following Hive commands:

Which one of the following statements Is true?

A) The file mydata.txt is moved to a subfolder of /apps/hive/warehouse
B) The file mydata.txt is copied to a subfolder of /apps/hive/warehouse
C) The file mydata.txt does not move from Its current location in HDFS
D) The file mydata.txt is copied into Hive's underlying relational database 0.

2. Which two of the following statements are true about Pig's approach toward data? Choose 2 answers

A) Accepts any data: structured or unstructured
B) Accepts only data that has a key/value pair structure
C) Accepts only data that is defined by metadata tables stored in a database
D) Accepts data whether it has metadata or not
E) Accepts tab-delimited text data only

3. On a cluster running MapReduce v1 (MRv1), a TaskTracker heartbeats into the JobTracker on your
cluster, and alerts the JobTracker it has an open map task slot.
What determines how the JobTracker assigns each map task to a TaskTracker?

A) The amount of RAM installed on the TaskTracker node.
B) The amount of free disk space on the TaskTracker node.
C) The location of the InsputSplit to be processed in relation to the location of the node.
D) The number and speed of CPU cores on the TaskTracker node.
E) The average system load on the TaskTracker node over the past fifteen (15) minutes.

4. 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 B
B) Option D
C) Option C
D) Option A

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

Solutions: