6- 3 What are the principal tools and technologies for accessing information from databases to improve business performance and decision making?

• Explain why businesses may be more interested in big data than in smaller data sets.

• Describe how a business might use a data mart.

• Describe the capabilities of Hadoop Distributed File System for data storage.

• Explain how in-memory computing can be used to facilitate data analysis.
• Explain what is meant by clustering in the context of data mining.
• Describe sentiment analysis and suggest why a business might use it.