Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Please explain, in light of the aforementioned three reasons, why it is preferable to have accessors for private types as opposed to making them public.
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- Give an example of using wrapper classes for non-object data types to prevent accidental concatenation of unrelated data kinds.arrow_forwardWhen it comes to attribute inheritance, there is a lot to think about.arrow_forwardIn order to prevent the mixing of non-object and object values, how may wrapper classes for non-object data types be used?arrow_forward
- What are the different classes of “users” represented by this object model? What are the associations between these classes?arrow_forwardFrom the following UML class diagram, compute the coupling factor (CF) for each class? What is the average CF of the entire system? [Hints: Do not count inheritance-based relationships]arrow_forwardSolve the system using Design the Class Diagram (that contains at least 10 classes, show appropriaterelationships, multiplicities, attributes, and methods) (Examplearrow_forward
- In java programming (object-oriented programming in general) Why is it important to invest additional work and additional code to prevent highly coupled classes? Give three basic reasonsarrow_forwardWhile we discussed the steps to define an interface for a class, we mentioned that that a class interface typically contains only methods and publicly accessible data fields generally cause problems. 1. Explain why this practice causes problems? 2. Explain two reasons for your statement.arrow_forward
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