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Explain about the E-R Diagram
Entity-relationship (E-R) diagram is detailed logical representation of data for an organisation. It is data oriented model of a system while DFD is a process oriented model. ER diagram represent data at rest whereas DFD tracks the motion of data.
ERD doesn't provide any information regarding functionality of data. It has 3 main components - data entities, their relationships and their associated attributes.
What does modality in data modeling indicates? Modality shows whether or not a particular data object must participate in the relationship.
EXPLAIN COMPONENTS OF DATABASE MANAGEMENT
Q. Resource usage with reference to software reliability models? Resource usage: It is linearly proportional to implementation time t and mean failures experienced μ. Let Xr
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discuss how your organization can take advantage of outsourcing its IT systems/functions
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Cardinality & Optionally Cardinality represents the relationship between two entities. Consider one to many relationship between two entities -student andclass. Here cardinal
What are the principle stages of VORD method? Viewpoint identification: Identify the services provided to each point of view Viewpoint structuring: Sorting related viewpoint
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