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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 is software maintenance? Changes to the software are made in response to altered requirements but the fundamental structure of the software remains stable.
Write short notes on empirical estimation models. Estimation model for computer software uses empirically derived formulas to expect effort as a function of line of codes (LOC)
which paradigm tend to correspond with top down and bottom up design
A program is to be developed to simulate the operations of a scientific calculator. List the facilities to be provided by this calculator. Analyze this using a DFD 0 - level and 1
What are the principle stages of VORD method? Viewpoint identification: Identify the services given to each viewpoint. Viewpoint structuring: Grouping linked viewpoints in t
Q. Define cohesion and coupling? Give suitable examples. Ans Coupling: Coupling refers to the strength of the relationship between modules in a system. Coupling represents how
Difference between Verification and Validation Verification is Static whereas Validation is Dynamic. This means in Verification the s/w is inspected by looking into the code go
Handling customer complaints There are always some customers who complain after completing the sales. Like customer objections, don't take complaints negatively. Other than
What is meant by Information flow Continuity? When we refine a fundamental model for a system, the information flow continuity must be maintained .ie, input & output to every r
What are the Problems held while creating system flowchart (1) A company selling CDs and DVDs presently uses a paper-based, manual system to keep track of: - Stock levels
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