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

1. Identify the MapReduce v2 (MRv2 / YARN) daemon responsible for launching application containers and
monitoring application resource usage?

A) TaskTracker
B) ApplicationMasterService
C) ApplicationMaster
D) JobTracker
E) NodeManager
F) ResourceManager

2. Assuming default settings, which best describes the order of data provided to a reducer's reduce method:

A) The keys given to a reducer are in sorted order but the values associated with each key are in no
predictable order
B) Both the keys and values passed to a reducer always appear in sorted order.
C) Neither keys nor values are in any predictable order.
D) The keys given to a reducer aren't in a predictable order, but the values associated with those keys
always are.

3. MapReduce v2 (MRv2/YARN) splits which major functions of the JobTracker into separate daemons?
Select two.

A) Resource management
B) Heath states checks (heartbeats)
C) Job scheduling/monitoring
D) Job coordination between the ResourceManager and NodeManager
E) Launching tasks
F) MapReduce metric reporting
G) Managing file system metadata
H) Managing tasks

4. You want to understand more about how users browse your public website, such as which pages they
visit prior to placing an order. You have a farm of 200 web servers hosting your website. How will you
gather this data for your analysis?

A) Write a MapReduce job, with the web servers for mappers, and the Hadoop cluster nodes for reduces.
B) Channel these clickstreams inot Hadoop using Hadoop Streaming.
C) Import all users' clicks from your OLTP databases into Hadoop, using Sqoop.
D) Sample the weblogs from the web servers, copying them into Hadoop using curl.
E) Ingest the server web logs into HDFS using Flume.

5. What does the following command do? register '/piggyban):/pig-files.jar';

A) Assigns a name to a user-defined function or streaming command
B) Transforms Pig user-defined functions into a format that Hive can accept
C) Invokes the user-defined functions contained in the jar file
D) Specifies the location of the JAR file containing the user-defined functions

Solutions: