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

1. 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 copy the JAR to all nodes in the cluster and set its location in the
HADOOP_CLASSPATH environment variable before you submit your job.
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 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.

2. Workflows expressed in Oozie can contain:

A) Sequences of MapReduce job only; on Pig on Hive tasks or jobs. These MapReduce sequences can
be combined with forks and path joins.
B) Iterntive repetition of MapReduce jobs until a desired answer or state is reached.
C) Sequences of MapReduce and Pig. These sequences can be combined with other actions including
forks, decision points, and path joins.
D) Sequences of MapReduce and Pig jobs. These are limited to linear sequences of actions with
exception handlers but no forks.

3. Which HDFS command uploads a local file X into an existing HDFS directory Y?

A) hadoop scp X Y
B) hadoop fs-put X Y
C) hadoop fs -localPut X Y
D) hadoop fs -get X Y

4. Which one of the following Hive commands uses an HCatalog table named x?

A) SELECT * FROM x;
B) SELECT x.-FROM org.apache.hcatalog.hive.HCatLoader('x');
C) Hive commands cannot reference an HCatalog table
D) SELECT * FROM org.apache.hcatalog.hive.HCatLoader('x');

5. What does the following WebHDFS command do?
Curl -1 -L "http://host:port/webhdfs/v1/foo/bar?op=OPEN"

A) Make a directory /foo/bar
B) List a directory /foo
C) Read a file /foo/bar
D) Delete a directory /foo/bar

Solutions: