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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 the Evolution of software engineering Any application on computer runs by software. As computer technologies have changed tremendouslyinthe last five decades, consequen
What are the advantages and disadvantages of using a Business Intelligence (BI) software system in a small/medium level business?
Q. Explain the development phases of the detailed COCOMO model. Ans A software development is performed in four successive phases which are as follows 1 : plan/requirement
Coupling and Cohesion Data coupling - The data coupling is possible by parameter passing or data interaction. Control coupling - The modules share related control data
What is a Real time system? Real time system is a software system in which the correct functionalities of the system are dependent upon results formed by the system and the tim
(a) Draw an Entity-Relationship model for the relational schema given in the Appendix. Show all the entities, relationships, relationship names, and attributes and also underline
Draw a memory map for a system with a memory capacity of 256MB. Each memory location in the system is 8 bits. Assume the system has one 4 MB memory block used as ROM residing at th
what is meant by 345 rule in IEEE 802.3 ?
What does Level0 DFD represent? Level0 DFD is known as 'fundamental system model' or 'context model'. In the context model the entire software system is shown by a single bubb
What specific languages can be used in SRS? Requirement specification necessitates the use of some order language. The language should support the desired qualities of the SRS-
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