Answer to Question 1
Relational databases store data in tables like spreadsheets that represent entities. An
entity often represents a business object. Each row of the table, called a tuple, represents a particular entity or instance. Each column represents an attribute of the entities. For each record, there is a key that uniquely defines a particular record. Relational databases allow tables to be decomposed into normalized so that tables that canbe joined whenever needed through algorithms. Algorithms allow various kinds of operations to be performed on the data, such as selecting one or more columns, projecting one or more rows, joining rows from several tables by matching column values.
Answer to Question 2
Any combination of the following.
1. IT principles - high-level statements about how IT will be used to create business value.
2. IT infrastructure strategies - state the approach for building shared and standard
3. IT services across the enterprise.
4. IT architecture - states the technical choices that will meet business needs.
5. Business application needs - where the business defines its application needs.
6. IT investment and prioritization - defines the process for moving IT-based investments through justification, approval, and accountability.
