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

What is parkinsons law, What is Parkinson's Law? Parkinson's Law states...

What is Parkinson's Law? Parkinson's Law states that work expands to fill the time available. The cost is fixed by available resources rather than by objective assessment.

Daa, 3. Explain asymptotic notations and their significance

3. Explain asymptotic notations and their significance

Calculate the development time, Q. Assuming the Putnam model and given S = ...

Q. Assuming the Putnam model and given S = 100,000 C = 5000 and D 0 = 15 calculate the development time t d.  Ans: In Putnam model (S/C ) 3 = D 0 t d 7 lhs = 20

Explain lines of code (loc), Lines of code (LOC) is a software metric used...

Lines of code (LOC) is a software metric used to calculate the size of a software program by counting the number of lines in the text of the program's source code. LOC is typicall

State the level 3 of kpas, State the level 3 of KPAs Level 3 KPAs: ...

State the level 3 of KPAs Level 3 KPAs: 1)   Organisation Process Focus (OPF): Organisations responsibility is fixed for software process activities which improve the ul

What is meant by data dictionary, What is meant by Data dictionary? The...

What is meant by Data dictionary? The Data dictionary is a prepared listing of all data elements that are pertinent to the system, with precise, rigorous explanations so that b

What is bottom-up approach, What is bottom-up approach? System develop...

What is bottom-up approach? System developed starting from detailed modules. Testing begins from the detailed modules and proceeds up to the higher levels of hierarchy.

What is crash, The sudden and finish failure of a computer system or compon...

The sudden and finish failure of a computer system or component.

Explain scalability of information systems, Question: (a) The relations...

Question: (a) The relationship between organisations and information technology is a complex one, and is made up of a number of mediating factors which must be considered prior

What are the various kinds of system testing, What are the various types of...

What are the various types of system testing? 1. Recovery testing - is intended to check the system's capability to recover from failures. 2. Security testing - verifies tha

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