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7 Cards in this Set
- Front
- Back
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What is an information system?
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Can be used for: data collection, data storage, and data retrieval. Also converts data into information.
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What is Systems Development Life Cycle (SDLC)?
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An iterative process not a sequential process.
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Name phases of the SDLC and list at least two activities from each phase.
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1.Database initial study -Analyze situation, Define objectives
2.Database design -Create the conceptual design, Create the logical design 3.Implementation and loading -Install the DBMS, Create the database(s) 4.Testing and evaluation -Test the database, Fine- tune the database 5.Operation -Produce the required information flow 6.Maintenance and evolution -Introduce changes, Make enhancements 7. Cycle repeats |
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What is Database Life Cycle (DBLC)?
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Trace the history of the database within an information system.
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Name phases of the DBLC and list at least two activities from each phase.
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1. Planning phase- initial assessment, and feasibility study
2. Analysis phase – user requirements, existing system evaluation, logical system design 3. Detailed systems design phase – detailed system specification 4. Implementation phase – coding, testing, and debugging , and installation, fine-tuning 5. Maintenance phase – evaluation, maintenance, enhancement |
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What is the difference between conceptual design and logical design?
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Conceptual – abstract overview of system (independent of hardware and software)
Logical – mapped to specific software |
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Briefly Describe top-down, bottom-up, centralized, and decentralized database design strateigies.
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•Top-down- Create Entities and then create Attributes
•Bottom-up – Create Attributes and then Create Entities •Centralized – All components in centralized location •Decentralized – design process is divided into modules, a team of designers work on a module, each module is verified and integrated to create aggregate module which is used to create conceptual design. |
