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System Design: An Object Oriented Approach
Any software systems always try to change and evolve as technology and business rules evolve. The development of information systems is unavoidable and it is a natural phenomenon. Organisations require to support systems evolution to take benefit of new technology and to address changing business rules. The evolutionary nature of software products requires us to maintain products with their repeatedly changing nature.
Not every software product developed is adaptable to these fast changes. In this fastly-increasing competitive business environment, there is hardly left any option instead of adopting technology that is adaptable to changes.
What is Multivalued Attribute? Multivalued Attribute - Multivalued attribute might have more than one value for an entity. For instance, PreviousDegrees of a STUDENT.
Explain outer join? Outer Join - If there are any values in one table which do not have corresponding value(s) in the other, in an equi-join which will not be chosen. Such ro
What is a view? A view is a logical view on one or more tables. A view on one or more tables i.e., the data from a view is not actually physically kept instead being derived f
The indices are accumulated in the index files. The data is accumulated in the data files. Indices give fast access to data items. For example, a book database may be managed in th
What is called an evaluation primitive? A relational algebra operation annotated with instructions on how to evaluate is known as an evaluation primitive.
What is deadlock? How can it be avoided? How can it be resolved once it occurs? Deadlock happens when two transactions are each waiting on a resource that the other transaction
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
brief history,definition,current trends and future trends if any of data fragmentation
Q. Why would you choose a database system instead of simply storing data in operating system file? Define at a base concept in details. Sol. Advantages of Database over Fil
Determine the method of Choosing Algorithms In general, most of operations are easy and have a satisfactory algorithm since description of what is to be done also shows how i
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