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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.
Q. Illustrate Partitioning in stepwise refinement? Problems are frequently too large and complex to be understood as a whole. Therefore we tend to partition such problems into
Q. Describe system testing? Ans. System testing: System test are designed to validate a completely developed systems with a view to assuring that it meets its requirements
When must a function throw an exception? A function must throw an exception when it's not able to fulfil its promise. As soon as function detects a problem which prevents it
What are the profits of vertical partitioning? i. These are very easy to maintain changes. ii. They decreased the change impact and error propagation.
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
Incremental testing is fractional testing of an incomplete product. The aim of incremental testing is to give an early feedback to software developers.
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Define the factors of prime concern for system modeling Following four factors are of prime concern for system modeling: 1. System modeling is undertaken with some simplifyi
Explain Structure-based testing techniques - Structure-based testing methods are also termed as white-box testing techniques. - These are dynamic methods. - They use the
What are Quality reviews? This is the principal method of validating the quality of a process or of a product. A group examines part or all of a process or system and its do
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