Section 2 (Answer all questions in this section) 1. An ERD is an example of a Physical Model. True or False? Mark for Review (1) Points True False 2. Data modeling is performed for the following reasons: (Choose Two) Mark for Review (1) Points (Choose all correct answers) We do not need datamodels; we can just start coding right away. It helps discussions and reviews. We draw an ERD solely to please the users; once completed, the ERD is never referred to again as it serves no purpose in the real world. The ERD becomes a blueprint for designing the actual system. 3. A Conceptual Model is not concerned with how the Physical Model will be implemented. True or False? Mark for Review (1) Points True False 4. Many reasons exist for creating a conceptual model. Choose three appropriate reasons from the options below. Mark for Review (1) Points (Choose all correct answers) They accurately describe what a physical model will contain. They model functional and informational needs. They capture current and future needs. They model the information flow of data. They capture the implementation details of the physical model. 5. Which of the following statements are true about ERD's? (Choose Two) Mark for Review (1) Points (Choose all correct answers) You should not model derivable data. A piece of information should only be found in one place on an ERD. All data must be represented on the ERD, including derived summaries and the result of calculations. A piece of information can be shown multiple times on an ERD. Page 1 of 3 Next Summary Finish Test