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Hortonworks Hadoop 2.0 Certification exam for Pig and Hive Developer Sample Questions:

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

2. Which one of the following statements describes the relationship between the ResourceManager and the ApplicationMaster?

A) The ApplicationMaster starts a single instance of the ResourceManager
B) The ApplicationMaster requests resources from the ResourceManager
C) The ResourceManager monitors and restarts any failed Containers of the ApplicationMaster
D) The ApplicationMaster starts an instance of the ResourceManager within each Container

3. To process input key-value pairs, your mapper needs to lead a 512 MB data file in memory. What is the best way to accomplish this?

A) Serialize the data file, insert in it the JobConf object, and read the data into memory in the configure method of the mapper.
B) Place the data file in the DistributedCache and read the data into memory in the configure method of the mapper.
C) Place the data file in the DataCache and read the data into memory in the configure method of the mapper.
D) Place the data file in the DistributedCache and read the data into memory in the map method of the mapper.

4. Given a directory of files with the following structure: line number, tab character, string:
Example:
1abialkjfjkaoasdfjksdlkjhqweroij
2kadfjhuwqounahagtnbvaswslmnbfgy
3kjfteiomndscxeqalkzhtopedkfsikj
You want to send each line as one record to your Mapper. Which InputFormat should you use to complete the line: conf.setInputFormat (____.class) ; ?

A) BDBInputFormat
B) SequenceFileAsTextInputFormat
C) KeyValueFileInputFormat
D) SequenceFileInputFormat

5. Which YARN component is responsible for monitoring the success or failure of a Container?

A) ResourceManager
B) JobTracker
C) NodeManager
D) ApplicationMaster

Solutions: