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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 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.
3. Explain asymptotic notations and their significance
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
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 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? 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? System developed starting from detailed modules. Testing begins from the detailed modules and proceeds up to the higher levels of hierarchy.
The sudden and finish failure of a computer system or component.
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 types of system testing? 1. Recovery testing - is intended to check the system's capability to recover from failures. 2. Security testing - verifies tha
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