Telegram group: T.me/BBCNOUN ====== CIT412 ====== 1. An occurrence at a point in time which may change the state of the system, such as arrival of a customer or start of work on a job is known as? State Time --->> Event Entity 2. The three perspectives of data models are? Attribute, Boundary and physical level --->> External, Conceptual and physical level Three tiers level Relational, modeling physical level 3. A ________is a theory or specification describing how a database is structured and used --->> Database model Conceptual model External model Physical model 4. An object that passes through the system, such as cars in an intersection or orders in a factor _______ State Time Attribute --->> Entity 5. Each element that possesses a set of distinguishing points called nodal points or? Shortest points --->> Nodes for short Convex points Focal points 6. ______is a fundamental and sometimes intangible notion covering the recognition, observation, nature, and stability of patterns and relationships of entities Language Conceptual --->> Structure Physical 7. A ______is any artificial language that can be used to express information or knowledge or systems in a structure that is defined by a consistent set of rules Oriented Programming Model Structure --->> Modelling language 8. A model organizes data using two fundamental constructs, called records and sets is known as? --->> Network model Interface model Conceptual model Nodes model 9. The Elements that can have one, two or three space dimensions is known as _______ Analysis Data set --->> Dimensionality Model 10. A variable characterizing an attribute in the system such as level of stock in inventory or number of jobs in waiting for processing is known as? Event --->> State Time Entity