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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.
Explain Validation and verification testing? Ans) Used as an entity to describe a procedure of review, analysis, and testing all over the software life cycle to discover errors,
RAD Model Rapid Application Development Model is the part of incremental model. Achieves the high speed development using component based construction. Phases
What is meant by System Requirements Set out the system constraints and services in well explained. Serves as a contract among the system buyer & the system developer.
Why Software maintenance is require Software maintenance is done due to the below factors. i) To rectify the errors which are encountered during the operation of software.
What is requirement engineering? Requirement engineering is the process of establishing the services that the customer needs from the system and the constraints under which it
What is software engineering? Software engineering is a regulation in which theories, methods and tools are applied to make professional software.
What is the diamgram .
The inability of a system or system component to perform a needed function within specified limits.
Explain the reuse maintenance model with the help of a diagram. Reuse maintenance model: This model is based on the principal that maintenance could be viewed as an activity i
vi curve
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