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Describe Dynamic Model.
The dynamic model specifies allowable sequences of changes to the objects from an object model. It contains event trace diagrams describing scenarios. An event is the external stimulus from one object to other that occurs at a particular point of time. An event is one-way transmission of information from one object to other. A scenario is sequence of events which occurs during one particular execution of the system. Each fundamental execution of the system shall be represented as a scenario.
The File Based System File based systems are an early attempt to computerise the manual filing system. For example, a manual file can be set up to hold all the correspondence r
Define Query Processing Query processing is the process of selecting the best plan or strategy to be employed in responding to a database request. The plan is then executed to
Dependency Preservation It is obvious that the decomposition must be lossless so that we do not lose any information from the relation that is decomposed. Dependency preservati
for the following business rules . Identify all entities, attributes, relationships, primary keys, cardinalities and constraints where appropriate 3. (9) An art museum owns a larg
The Database administrator (DBA) uses the data dictionary in each phase of a database life cycle, beginning from the data gathering phase to the design, execution and maintenance p
Explain the B + tree? B + tree is a type of tree which denotes sorted data in a way that permits for efficient insertion, retrieval and removal of records, each of which is
What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.
What is DML (Data Manipulation Language)? This language that enable user to access or manipulate data as organised by appropriate data model. Procedural DML or Low level: DM
List and explain the memory constructs of the Oracle 12c databases?
What are the benefits of decomposing a system? The benefits of decomposing a system into subsystems are that after decomposition, each individual component become smaller and e
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