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Explain the term - Adjustment of inheritance
The inheritance can be enlarged as object design progresses by changing class structure. The designer should do:
i) Adjust or rearrange classes and operations
ii) Abstract common behavior out of groups of the classes
iii) Use delegation to share the behaviour when inheritance is semantically wrong.
Complete replication: It implies maintaining of a whole copy of the database at every site. Thus, the reliability & availability and performance for query response are maximized.
Unrepeatable reads : Assume T7 reads X twice during its implementation. If it did not update X itself it could be very disturbing to see a dissimilar value of X in its next read. B
Assume that you are responsible for selecting a new DBMS product for Sohar Hospital
What is data block? Data Block - In oracle the data blocks are referred to as tablespaces. A tablespace is an fields of disk consisting of one or more disk files. A tablespace
define attribute inheritance with example?
Describe how you can simplify Operations. To simplify operation, one should use inheritance, where possible to use, to reduce the quantity of distinct operations. Introduce new
Differentiate OO development from structured development. Structured approach of problem solving is based upon the idea of decomposition of system into subsystem. In this appro
Security: In a centralised system, access to the data can be simply controlled. Though, in a distributed DBMS not only does access to replicated data have to be controlled in many
Discuss how the bi-directional Implementations are made. In bi-directional implementation of the association, a pair of references must implement every link. The declarations a
waht is a repeating group?
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