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Discuss the term- Design Optimization
We have seen various ways of representing the objects.The fundamental design model uses analysis model as the framework for implementation. The analysis model captures logical information regarding system. To get better result, design model shall contain details to support efficient information access. The inefficient, but semantically-correct analysis model could be optimized to make implementation more fruitful, but an optimized system is more difficult to understand and likely to be reusable in any other context. For the design optimization, as a designer, we must strike an appropriate balance between both efficiency and clarity.
During design optimization as a designer we must keep following points in our mind:
What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
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What is meant by log-based recovery? The most widely used structures for recording database changes is the log. The log is a sequence of log records, recording all the update a
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In a relational model how relations are termed? In a relational model, relations are termed as tables. (The term ‘relation’ is the technical name of the ‘table’ in RDBMS)
Data Scrubbing 70,000 records Project Description: We need services of a developer competent in data cleansing/Data scrubbing. Scope: - 70,000 records in CSV format.
Define Shared locks? Ans: Shared lock: Throughout concurrent execution of transactions, earlier than a transaction can access a data item, it has to obtain a lock on it. Now he
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
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