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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.
Define upgrade and downgrade? It gives a mechanism for conversion from shared lock to exclusive lock is called as upgrade. It gives a mechanism for conversion from exclusive
What is called mirroring? The simplest approach to introducing redundancy is to duplicate each disk. This method is called mirroring or shadowing.
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Which product produces the relation that has attributes of R1 and R2 ? Cartesian product produce the relation which has attributes of R1 and R2
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
Authorisation Authorisation is the culmination of the administrative policies of the organisation. As the name shows, authorisation is a set of rules that can be used to verif
1. Which relational algebra operations do not need the participating tables to be union-compatible? Ans: Join is the relational algebra operations that do not need the particip
What should be declared explicitly in the corresponding ABAP/4 Statements to access internal tables without header lines & why? Work Area. This is needed as the Work Area is
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
Data Manipulation Language Data manipulation language (DML) describes a set of commands that are used to query and change data within existing schema objects. In this case comm
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