The basic concepts of ER model are:

Related Questions

• __________ is the intellectual tool that allows us to deal with concepts apart from particular instances of those concepts.
• In system modeling : A-Classification model; B-Stimulus-response model; C-Data processing model: 1-Here data-flow diagram show how data is processed at different stages; 2-Here object class/inheritance diagram show, how entities have the common characteristics;3-Here state transition diagram shows the how the system reader to internal and external events
• In system modeling Statement-1: State-machine model is used to model the behavior of a system in response to internal and external events. Statement-2: Stimulus response model represents state transition diagram that show how system reacts to internal and external events.
• Basic execution time model was developed by
• In Basic execution time model, failure intensity is given by
• In Basic execution time model, additional number of failures required to achieve a failure intensity objective is expressed as
• The software life cycle can be said to consist of a series of phases. The classical model is referred to as the waterfall model. Which phase may be defined as “The concept is explored and refined, and the client’s requirements are elicited?”
• Which of the following steps may not be used to define the existing data model as a precursor to re-engineering a new database model:
• In system modeling: A-Architectural model: B-Stimulus-response model: C-Behavioral models: 1-Used to describe the overall behavior of the system: 2-State transition diagram show how the system reacts to internal and external events: 3-Shows principal sub-systems which makes the system
• Match the following: A- Formal mathematical transformation: B- Formal process model: C-Formal Specifications: D-Formal System development: 1- Here the formal mathema- tical representation of the system takes place. 2- It is a starting point for process analysis. It is abstract and only defines the principal process activities and deliverables. 3-Specifications expressed in a language whose vocabulary, syntax and semantics are formally defined. 4-It is more common to waterfall model, but here the development process is based on formal mathematical transformation of a system specification to an exactable program.