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What is DAG?
The class-subclass relationship is shown by a directed acyclic graph.eg: employees can be temporary or permanent. We might be create subclasses temporary \and permanent, of the class employee.
Why, generally does an object-oriented system use the relational DBMS? The reasons for using relational DBMS for OO systems could be any combination of following: a. Many or
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
You are required to write a report which evaluates two of the following issues in relation to your case study database: a. Security issues b. Performance issues c. Backup
Project: Microsoft Access You have been asked by the ABC Tanning Salon to create a database that can be used to track the salon's customers. You are to create a table in Access
I need to Map an E-R diagram to a relational schema
Give the levels of data abstraction? There are three levels of Data Abstraction a) Physical level b) logical level c) view level
What is trigger Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
What is inheritance? Inheritance is an object orientation concept that allows reusability of code / design. Basic sense of inheritance is that if one class is predefined than a
Rearrange Classes and Operations Sometimes, the similar operation is defined across different classes and can easily be inherited from a familiar ancestor, but more often oper
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
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