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

Explain predictive validity, Q. Explain Predictive validity? Predictiv...

Q. Explain Predictive validity? Predictive validity: It is the potential of the model to predict future failure behaviour from present and past failure behaviour. This capabi

What is a modular system, Q What is a modular system? List the important pr...

Q What is a modular system? List the important properties of a modular system? Ans: A modular system consists of well-defined manageable units to well-defined interfaces among

Explain network switching subsystem in gsm, Question: (a) (i) What are...

Question: (a) (i) What are the main components of the Network Switching Subsystem in GSM? (ii) What are the main functions of the Network Switching Subsystem? (b) What

What is function count, Function count:- It measures the functionality fro...

Function count:- It measures the functionality from the user point of view, that is, on the basis of what the user requests and receives in return. Therefore it deals with the fun

Data Dictionary, The University needs to develop an online student registra...

The University needs to develop an online student registration system for new CAO entrants. This system will allow new students to enroll in their university course. Each student i

What are the various elements of data design, What are the various elements...

What are the various elements of data design? i. Data object - The data objects are identified and relationship between various data objects can be shown using ERD or data di

Write about software change strategies, Write about software change strateg...

Write about software change strategies. The software change methods that could be applied separately or together are: Software maintenance - The alters are made in the software

Explain the iterative model, Explain the Iterative Model Every release ...

Explain the Iterative Model Every release of Iterative Model is developed in a specific, fixed time period known as iteration. Each iteration focuses on a certain set of requir

Iterative enhancement and evolutionary development model, Q. Differentiate ...

Q. Differentiate between iterative Enhancement Model and Evolutionary Development model. Ans. Iterative Enhancement Model: This model has the similar phases as the waterfall

Write about drivers and stubs, Write about drivers and stubs. Drivers a...

Write about drivers and stubs. Drivers and stub software require to be developed to test incompatible software. The " driver" is a program that accepts the test data and pri

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