III. A salesperson writes a single invoice for each car he or she sells. IV. A customer gets an invoice for each car he or she buys. V. A customer may come in just to have his or her car serviced; that is, a customer need not buy a car to be classified as a customer. VI. When a customer takes one or more cars in for repair or service, one service ticket is written for each car. VII. The car dealership maintains a service history for each of the cars serviced. The service records are referenced by the car’s serial number. VIII. A car brought in for service can be worked on by many mechanics, and each mechanic may work on many cars. IX. A car that is serviced may or may not need parts (e.g., adjusting a carburetor or cleaning a fuel injector nozzle does not require providing new parts). 3. With the aid of an appropriate diagram, explain how DBMS ensure that requests from end users are satisfactorily addressed. 4. (a). In the construction of a database system (DBS) explain the traditional approaches that are no longer prevalent today. (b). Give a complete expected deliverable of the system development life cycle (SDLC). 5. (a). what are database trees and give a typical explanation on all the trees you know. (b). Give an illustration of all tree diagrams in 5a . “YOU WILL NEVER FIND TIME FOR ANYTHING. IF YOU WANT TIME YOU MUST MAKE IT” 1
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- Fall '19
- Database normalization, Car dealership