Explain about the e-r diagram, Software Engineering

Assignment Help:

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.

 

 


Related Discussions:- Explain about the e-r diagram

Iterative and evolutionary development, what is iterative and evolutionary ...

what is iterative and evolutionary developments? how iteration help in refining requirements

Define archives as records and explain their importance, QUESTION 1 (a)...

QUESTION 1 (a) Define "archives" as records and explain their importance. (b) Elaborate on the steps archivists have to undertake for the storage of archival records. QU

Enumerate the evolution of software, Enumerate the evolution of software ...

Enumerate the evolution of software The below Table summarises evolution of software: 1960s Infancy Machine Code 1970s Project Years

Explain acceptance testing and beta testing, Q. Explain acceptance testing ...

Q. Explain acceptance testing and beta testing? Acceptance Testing as well as Beta testing: System tests are designed to authenticate a fully developed system to guarantee th

Test questions, Dear Sir/ Madam I have some remaining test questions need ...

Dear Sir/ Madam I have some remaining test questions need to be answered, from yesterday''s test bank can I get a solution please? Regards John

State the cocomo model, What is COCOMO model? COCOMO stands for COnstru...

What is COCOMO model? COCOMO stands for COnstructive COst MOdel. It is used for cost Effort=a * KDLOCb Where a and b are two parameters of the model whose specific values

What is role of software engineer in software development, Q Who is a Softw...

Q Who is a Software Engineer? What is his role in software development process? Ans) A software engineer is responsible for the implementation and design of a variety of softwa

Applied physics, an isolated metal sphere has a radius r. when charged to a...

an isolated metal sphere has a radius r. when charged to a potential v, the charge on sphere is q. 1- state an expression, in terms of r and q, for potential v of sphere.

Explain capability maturity model, Overview You are a Systems Analyst w...

Overview You are a Systems Analyst working for Zeppelin Industries Inc. Many of the software projects your company attempts to deliver are failing or have already failed. The

Define object and class associations, Q. Define Object and class associatio...

Q. Define Object and class associations? Object/class associations:- Objects/classes interact with each other. Multiplicity defines how many instances of one object/class can

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd