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

1. Which one of the following statements regarding the components of YARN is FALSE?

A) The ResourceManager monitors and restarts any failed Containers
B) The ResourceManager is responsible for scheduling and allocating resources
C) A Container executes a specific task as assigned by the ApplicationMaster
D) A client application submits a YARW job to the ResourceManager

2. You've written a MapReduce job that will process 500 million input records and generated 500 million
key-value pairs. The data is not uniformly distributed. Your MapReduce job will create a significant
amount of intermediate data that it needs to transfer between mappers and reduces which is a potential
bottleneck. A custom implementation of which interface is most likely to reduce the amount of
intermediate data transferred across the network?

A) Writable
B) WritableComparable
C) OutputFormat
D) Partitioner
E) InputFormat
F) Combiner

3. Examine the following Pig commands:

Which one of the following statements is true?

A) The reducers will only output the first 20% of the data passed from the mappers
B) Each MapReduce task will terminate after executing for 0.2 minutes
C) A random sample of approximately 20% of the data will be output
D) The SAMPLE command generates an "unexpected symbol" error

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) Sample the weblogs from the web servers, copying them into Hadoop using curl.
C) Ingest the server web logs into HDFS using Flume.
D) Import all users' clicks from your OLTP databases into Hadoop, using Sqoop.
E) Channel these clickstreams inot Hadoop using Hadoop Streaming.

5. Identify the tool best suited to import a portion of a relational database every day as files into HDFS, and
generate Java classes to interact with that imported data?

A) Sqoop
B) Pig
C) Flume
D) fuse-dfs
E) Hue
F) Oozie
G) Hive

Solutions: