MCS-014CaseStudy

Jun 18th, 2015
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Black Hills State University
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What are the rules that need to be followed for drawing Data Flow Diagrams? Draw DFD’s (atleast upto 3rd level) for Student Information System. Make assumptions, wherever necessary. Ans. Rules for drawing DFD are: 1. Each process must have a minimum of one data flow going into it and one data flow leaving it. 2. Each data store must have at least one data flow going into it and one data flow leaving it. 3. A data flow out of a process should have some relevance to one or more of the data flows into a process.

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Case StudyQ.1Draw complete Entity Relationship Diagram (ERD) for a Railway Reservation System. Make assumptions wherever necessary.Ans.E-R Diagram for Railway Reservation SystemER- Diagram Q.2Draw a complete Relationship Diagram (ERD) for a Student Information System. Make assumptions wherever necessary.Ans.Q.3What are the rules that need to be followed for drawing Data Flow Diagrams? Draw DFDs (atleast upto 3rd level) for Student Information System. Make assumptions, wherever necessary.Ans.Rules for drawing DFD are:1. Each process must have a minimum of one data flow going into it and one data flow leaving it. 2. Each data store must have at least one data flow going into it and one data flow leaving it.3. A data flow out of a process should have some relevance to one or more of the data flows into a process.4. Data stored in a system must go through a process.5. Filing systems within an organisation cannot logically communicate with one another unless there is a process involved.6. All processes in DFD must be linked to either another process or a data store. DFD for Student Information Q.4Every vendor estimates the cost of a software project and presents it to the Client for consideration. How is it possible the cost of a Software Project before completing the project? What are issues that may arise due to estimation of cost of a Software Project before commenci

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