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The Ultimate Cheat Sheet On Hadoop

Top 20 frequently asked questions to test your Hadoop knowledge given in the below Hadoop cheat sheet. Try finding your own answers and match the answers given here.




Question #1 

You have written a MapReduce job that will process 500 million input records and generate 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 reducers which is a potential bottleneck. A custom implementation of which of the following interfaces is most likely to reduce the amount of intermediate data transferred across the network?



A. Writable
B. WritableComparable
C. InputFormat
D. OutputFormat
E. Combiner
F. Partitioner
Ans: e




Question #2 

Where is Hive metastore stored by default ?


A. In HDFS
B. In client machine in the form of a flat file.
C. In client machine in a derby database
D. In lib directory of HADOOP_HOME, and requires HADOOP_CLASSPATH to be modified.
Ans: c




Question…
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Trends In Digital Marketing in 2014-2015

Digital marketing uses various tools for digital marketing functions such as sales CRM, marketing automation, e-commerce, e-mail, WCM, web analytics, and social CRM.

Related
Skills for Digital Marketing You Need

All these software tools collectively help an organization to develop and implement effective marketing strategies.
Tools for Global Digital Marketing
  • These tools are developed to serve specific functions in the Global Digital Marketing market as explained below:
  • Sales CRM manages customer interaction and aligns an organization's sales process such as order tracking, sales performance, and distribution.
  • Marketing automation enhances the capabilities of the marketing department of any organization to design strategies, automate processes, and improve customer communications, and also operates either as standalone software or as a major component of CRM software.
  • E-commerce software offers advanced capabilities for searching, order management, cart management, and content management, as well as marketing and reporting capabilities.
  • E-mail marketing software enables organizations to reach out to customers directly through emails and helps to automate the marketing process by offering more sales leads.
  • WCM is a software tool used to create, manage, store, and deploy content on the internet. The content may be in the form of text, audio, graphics, videos, and photos.
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